tools/vm/slabinfo.c

   1 /*
   2  * Slabinfo: Tool to get reports about slabs
   3  *
   4  * (C) 2007 sgi, Christoph Lameter
   5  * (C) 2011 Linux Foundation, Christoph Lameter
   6  *
   7  * Compile with:
   8  *
   9  * gcc -o slabinfo slabinfo.c
  10  */
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <sys/types.h>
  14 #include <dirent.h>
  15 #include <strings.h>
  16 #include <string.h>
  17 #include <unistd.h>
  18 #include <stdarg.h>
  19 #include <getopt.h>
  20 #include <regex.h>
  21 #include <errno.h>
  22
  23 #define MAX_SLABS 500
  24 #define MAX_ALIASES 500
  25 #define MAX_NODES 1024
  26
  27 struct slabinfo {
  28         char *name;
  29         int alias;
  30         int refs;
  31         int aliases, align, cache_dma, cpu_slabs, destroy_by_rcu;
  32         int hwcache_align, object_size, objs_per_slab;
  33         int sanity_checks, slab_size, store_user, trace;
  34         int order, poison, reclaim_account, red_zone;
  35         unsigned long partial, objects, slabs, objects_partial, objects_total;
  36         unsigned long alloc_fastpath, alloc_slowpath;
  37         unsigned long free_fastpath, free_slowpath;
  38         unsigned long free_frozen, free_add_partial, free_remove_partial;
  39         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
  40         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
  41         unsigned long deactivate_to_head, deactivate_to_tail;
  42         unsigned long deactivate_remote_frees, order_fallback;
  43         unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
  44         unsigned long alloc_node_mismatch, deactivate_bypass;
  45         unsigned long cpu_partial_alloc, cpu_partial_free;
  46         int numa[MAX_NODES];
  47         int numa_partial[MAX_NODES];
  48 } slabinfo[MAX_SLABS];
  49
  50 struct aliasinfo {
  51         char *name;
  52         char *ref;
  53         struct slabinfo *slab;
  54 } aliasinfo[MAX_ALIASES];
  55
  56 int slabs = 0;
  57 int actual_slabs = 0;
  58 int aliases = 0;
  59 int alias_targets = 0;
  60 int highest_node = 0;
  61
  62 char buffer[4096];
  63
  64 int show_empty = 0;
  65 int show_report = 0;
  66 int show_alias = 0;
  67 int show_slab = 0;
  68 int skip_zero = 1;
  69 int show_numa = 0;
  70 int show_track = 0;
  71 int show_first_alias = 0;
  72 int validate = 0;
  73 int shrink = 0;
  74 int show_inverted = 0;
  75 int show_single_ref = 0;
  76 int show_totals = 0;
  77 int sort_size = 0;
  78 int sort_active = 0;
  79 int set_debug = 0;
  80 int show_ops = 0;
  81 int show_activity = 0;
  82 int output_lines = -1;
  83 int sort_loss;
  84
  85 /* Debug options */
  86 int sanity = 0;
  87 int redzone = 0;
  88 int poison = 0;
  89 int tracking = 0;
  90 int tracing = 0;
  91
  92 int page_size;
  93
  94 regex_t pattern;
  95
  96 static void fatal(const char *x, ...)
  97 {
  98         va_list ap;
  99
 100         va_start(ap, x);
 101         vfprintf(stderr, x, ap);
 102         va_end(ap);
 103         exit(EXIT_FAILURE);
 104 }
 105
 106 static void usage(void)
 107 {
 108         printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
 109                 "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
 110                 "-a|--aliases           Show aliases\n"
 111                 "-A|--activity          Most active slabs first\n"
 112                 "-d<options>|--debug=<options> Set/Clear Debug options\n"
 113                 "-D|--display-active    Switch line format to activity\n"
 114                 "-e|--empty             Show empty slabs\n"
 115                 "-f|--first-alias       Show first alias\n"
 116                 "-h|--help              Show usage information\n"
 117                 "-i|--inverted          Inverted list\n"
 118                 "-l|--slabs             Show slabs\n"
 119                 "-n|--numa              Show NUMA information\n"
 120                 "-o|--ops               Show kmem_cache_ops\n"
 121                 "-s|--shrink            Shrink slabs\n"
 122                 "-r|--report            Detailed report on single slabs\n"
 123                 "-S|--Size              Sort by size\n"
 124                 "-t|--tracking          Show alloc/free information\n"
 125                 "-T|--Totals            Show summary information\n"
 126                 "-v|--validate          Validate slabs\n"
 127                 "-z|--zero              Include empty slabs\n"
 128                 "-1|--1ref              Single reference\n"
 129                 "-N|--lines=K           Show the first K slabs\n"
 130                 "-L|--Loss              Sort by loss\n"
 131                 "\nValid debug options (FZPUT may be combined)\n"
 132                 "a / A          Switch on all debug options (=FZUP)\n"
 133                 "-              Switch off all debug options\n"
 134                 "f / F          Sanity Checks (SLAB_DEBUG_FREE)\n"
 135                 "z / Z          Redzoning\n"
 136                 "p / P          Poisoning\n"
 137                 "u / U          Tracking\n"
 138                 "t / T          Tracing\n"
 139         );
 140 }
 141
 142 static unsigned long read_obj(const char *name)
 143 {
 144         FILE *f = fopen(name, "r");
 145
 146         if (!f)
 147                 buffer[0] = 0;
 148         else {
 149                 if (!fgets(buffer, sizeof(buffer), f))
 150                         buffer[0] = 0;
 151                 fclose(f);
 152                 if (buffer[strlen(buffer)] == '\n')
 153                         buffer[strlen(buffer)] = 0;
 154         }
 155         return strlen(buffer);
 156 }
 157
 158
 159 /*
 160  * Get the contents of an attribute
 161  */
 162 static unsigned long get_obj(const char *name)
 163 {
 164         if (!read_obj(name))
 165                 return 0;
 166
 167         return atol(buffer);
 168 }
 169
 170 static unsigned long get_obj_and_str(const char *name, char **x)
 171 {
 172         unsigned long result = 0;
 173         char *p;
 174
 175         *x = NULL;
 176
 177         if (!read_obj(name)) {
 178                 x = NULL;
 179                 return 0;
 180         }
 181         result = strtoul(buffer, &p, 10);
 182         while (*p == ' ')
 183                 p++;
 184         if (*p)
 185                 *x = strdup(p);
 186         return result;
 187 }
 188
 189 static void set_obj(struct slabinfo *s, const char *name, int n)
 190 {
 191         char x[100];
 192         FILE *f;
 193
 194         snprintf(x, 100, "%s/%s", s->name, name);
 195         f = fopen(x, "w");
 196         if (!f)
 197                 fatal("Cannot write to %s\n", x);
 198
 199         fprintf(f, "%d\n", n);
 200         fclose(f);
 201 }
 202
 203 static unsigned long read_slab_obj(struct slabinfo *s, const char *name)
 204 {
 205         char x[100];
 206         FILE *f;
 207         size_t l;
 208
 209         snprintf(x, 100, "%s/%s", s->name, name);
 210         f = fopen(x, "r");
 211         if (!f) {
 212                 buffer[0] = 0;
 213                 l = 0;
 214         } else {
 215                 l = fread(buffer, 1, sizeof(buffer), f);
 216                 buffer[l] = 0;
 217                 fclose(f);
 218         }
 219         return l;
 220 }
 221
 222
 223 /*
 224  * Put a size string together
 225  */
 226 static int store_size(char *buffer, unsigned long value)
 227 {
 228         unsigned long divisor = 1;
 229         char trailer = 0;
 230         int n;
 231
 232         if (value > 1000000000UL) {
 233                 divisor = 100000000UL;
 234                 trailer = 'G';
 235         } else if (value > 1000000UL) {
 236                 divisor = 100000UL;
 237                 trailer = 'M';
 238         } else if (value > 1000UL) {
 239                 divisor = 100;
 240                 trailer = 'K';
 241         }
 242
 243         value /= divisor;
 244         n = sprintf(buffer, "%ld",value);
 245         if (trailer) {
 246                 buffer[n] = trailer;
 247                 n++;
 248                 buffer[n] = 0;
 249         }
 250         if (divisor != 1) {
 251                 memmove(buffer + n - 2, buffer + n - 3, 4);
 252                 buffer[n-2] = '.';
 253                 n++;
 254         }
 255         return n;
 256 }
 257
 258 static void decode_numa_list(int *numa, char *t)
 259 {
 260         int node;
 261         int nr;
 262
 263         memset(numa, 0, MAX_NODES * sizeof(int));
 264
 265         if (!t)
 266                 return;
 267
 268         while (*t == 'N') {
 269                 t++;
 270                 node = strtoul(t, &t, 10);
 271                 if (*t == '=') {
 272                         t++;
 273                         nr = strtoul(t, &t, 10);
 274                         numa[node] = nr;
 275                         if (node > highest_node)
 276                                 highest_node = node;
 277                 }
 278                 while (*t == ' ')
 279                         t++;
 280         }
 281 }
 282
 283 static void slab_validate(struct slabinfo *s)
 284 {
 285         if (strcmp(s->name, "*") == 0)
 286                 return;
 287
 288         set_obj(s, "validate", 1);
 289 }
 290
 291 static void slab_shrink(struct slabinfo *s)
 292 {
 293         if (strcmp(s->name, "*") == 0)
 294                 return;
 295
 296         set_obj(s, "shrink", 1);
 297 }
 298
 299 int line = 0;
 300
 301 static void first_line(void)
 302 {
 303         if (show_activity)
 304                 printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");
 305         else
 306                 printf("Name                   Objects Objsize    %s "
 307                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n",
 308                         sort_loss ? "Loss" : "Space");
 309 }
 310
 311 /*
 312  * Find the shortest alias of a slab
 313  */
 314 static struct aliasinfo *find_one_alias(struct slabinfo *find)
 315 {
 316         struct aliasinfo *a;
 317         struct aliasinfo *best = NULL;
 318
 319         for(a = aliasinfo;a < aliasinfo + aliases; a++) {
 320                 if (a->slab == find &&
 321                         (!best || strlen(best->name) < strlen(a->name))) {
 322                                 best = a;
 323                                 if (strncmp(a->name,"kmall", 5) == 0)
 324                                         return best;
 325                         }
 326         }
 327         return best;
 328 }
 329
 330 static unsigned long slab_size(struct slabinfo *s)
 331 {
 332         return  s->slabs * (page_size << s->order);
 333 }
 334
 335 static unsigned long slab_activity(struct slabinfo *s)
 336 {
 337         return  s->alloc_fastpath + s->free_fastpath +
 338                 s->alloc_slowpath + s->free_slowpath;
 339 }
 340
 341 static unsigned long slab_waste(struct slabinfo *s)
 342 {
 343         return  slab_size(s) - s->objects * s->object_size;
 344 }
 345
 346 static void slab_numa(struct slabinfo *s, int mode)
 347 {
 348         int node;
 349
 350         if (strcmp(s->name, "*") == 0)
 351                 return;
 352
 353         if (!highest_node) {
 354                 printf("\n%s: No NUMA information available.\n", s->name);
 355                 return;
 356         }
 357
 358         if (skip_zero && !s->slabs)
 359                 return;
 360
 361         if (!line) {
 362                 printf("\n%-21s:", mode ? "NUMA nodes" : "Slab");
 363                 for(node = 0; node <= highest_node; node++)
 364                         printf(" %4d", node);
 365                 printf("\n----------------------");
 366                 for(node = 0; node <= highest_node; node++)
 367                         printf("-----");
 368                 printf("\n");
 369         }
 370         printf("%-21s ", mode ? "All slabs" : s->name);
 371         for(node = 0; node <= highest_node; node++) {
 372                 char b[20];
 373
 374                 store_size(b, s->numa[node]);
 375                 printf(" %4s", b);
 376         }
 377         printf("\n");
 378         if (mode) {
 379                 printf("%-21s ", "Partial slabs");
 380                 for(node = 0; node <= highest_node; node++) {
 381                         char b[20];
 382
 383                         store_size(b, s->numa_partial[node]);
 384                         printf(" %4s", b);
 385                 }
 386                 printf("\n");
 387         }
 388         line++;
 389 }
 390
 391 static void show_tracking(struct slabinfo *s)
 392 {
 393         printf("\n%s: Kernel object allocation\n", s->name);
 394         printf("-----------------------------------------------------------------------\n");
 395         if (read_slab_obj(s, "alloc_calls"))
 396                 printf("%s", buffer);
 397         else
 398                 printf("No Data\n");
 399
 400         printf("\n%s: Kernel object freeing\n", s->name);
 401         printf("------------------------------------------------------------------------\n");
 402         if (read_slab_obj(s, "free_calls"))
 403                 printf("%s", buffer);
 404         else
 405                 printf("No Data\n");
 406
 407 }
 408
 409 static void ops(struct slabinfo *s)
 410 {
 411         if (strcmp(s->name, "*") == 0)
 412                 return;
 413
 414         if (read_slab_obj(s, "ops")) {
 415                 printf("\n%s: kmem_cache operations\n", s->name);
 416                 printf("--------------------------------------------\n");
 417                 printf("%s", buffer);
 418         } else
 419                 printf("\n%s has no kmem_cache operations\n", s->name);
 420 }
 421
 422 static const char *onoff(int x)
 423 {
 424         if (x)
 425                 return "On ";
 426         return "Off";
 427 }
 428
 429 static void slab_stats(struct slabinfo *s)
 430 {
 431         unsigned long total_alloc;
 432         unsigned long total_free;
 433         unsigned long total;
 434
 435         if (!s->alloc_slab)
 436                 return;
 437
 438         total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 439         total_free = s->free_fastpath + s->free_slowpath;
 440
 441         if (!total_alloc)
 442                 return;
 443
 444         printf("\n");
 445         printf("Slab Perf Counter       Alloc     Free %%Al %%Fr\n");
 446         printf("--------------------------------------------------\n");
 447         printf("Fastpath             %8lu %8lu %3lu %3lu\n",
 448                 s->alloc_fastpath, s->free_fastpath,
 449                 s->alloc_fastpath * 100 / total_alloc,
 450                 total_free ? s->free_fastpath * 100 / total_free : 0);
 451         printf("Slowpath             %8lu %8lu %3lu %3lu\n",
 452                 total_alloc - s->alloc_fastpath, s->free_slowpath,
 453                 (total_alloc - s->alloc_fastpath) * 100 / total_alloc,
 454                 total_free ? s->free_slowpath * 100 / total_free : 0);
 455         printf("Page Alloc           %8lu %8lu %3lu %3lu\n",
 456                 s->alloc_slab, s->free_slab,
 457                 s->alloc_slab * 100 / total_alloc,
 458                 total_free ? s->free_slab * 100 / total_free : 0);
 459         printf("Add partial          %8lu %8lu %3lu %3lu\n",
 460                 s->deactivate_to_head + s->deactivate_to_tail,
 461                 s->free_add_partial,
 462                 (s->deactivate_to_head + s->deactivate_to_tail) * 100 / total_alloc,
 463                 total_free ? s->free_add_partial * 100 / total_free : 0);
 464         printf("Remove partial       %8lu %8lu %3lu %3lu\n",
 465                 s->alloc_from_partial, s->free_remove_partial,
 466                 s->alloc_from_partial * 100 / total_alloc,
 467                 total_free ? s->free_remove_partial * 100 / total_free : 0);
 468
 469         printf("Cpu partial list     %8lu %8lu %3lu %3lu\n",
 470                 s->cpu_partial_alloc, s->cpu_partial_free,
 471                 s->cpu_partial_alloc * 100 / total_alloc,
 472                 total_free ? s->cpu_partial_free * 100 / total_free : 0);
 473
 474         printf("RemoteObj/SlabFrozen %8lu %8lu %3lu %3lu\n",
 475                 s->deactivate_remote_frees, s->free_frozen,
 476                 s->deactivate_remote_frees * 100 / total_alloc,
 477                 total_free ? s->free_frozen * 100 / total_free : 0);
 478
 479         printf("Total                %8lu %8lu\n\n", total_alloc, total_free);
 480
 481         if (s->cpuslab_flush)
 482                 printf("Flushes %8lu\n", s->cpuslab_flush);
 483
 484         total = s->deactivate_full + s->deactivate_empty +
 485                         s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
 486
 487         if (total) {
 488                 printf("\nSlab Deactivation             Ocurrences  %%\n");
 489                 printf("-------------------------------------------------\n");
 490                 printf("Slab full                     %7lu  %3lu%%\n",
 491                         s->deactivate_full, (s->deactivate_full * 100) / total);
 492                 printf("Slab empty                    %7lu  %3lu%%\n",
 493                         s->deactivate_empty, (s->deactivate_empty * 100) / total);
 494                 printf("Moved to head of partial list %7lu  %3lu%%\n",
 495                         s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
 496                 printf("Moved to tail of partial list %7lu  %3lu%%\n",
 497                         s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
 498                 printf("Deactivation bypass           %7lu  %3lu%%\n",
 499                         s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
 500                 printf("Refilled from foreign frees   %7lu  %3lu%%\n",
 501                         s->alloc_refill, (s->alloc_refill * 100) / total);
 502                 printf("Node mismatch                 %7lu  %3lu%%\n",
 503                         s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
 504         }
 505
 506         if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
 507                 printf("\nCmpxchg_double Looping\n------------------------\n");
 508                 printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",
 509                         s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
 510 }
 511
 512 static void report(struct slabinfo *s)
 513 {
 514         if (strcmp(s->name, "*") == 0)
 515                 return;
 516
 517         printf("\nSlabcache: %-20s  Aliases: %2d Order : %2d Objects: %lu\n",
 518                 s->name, s->aliases, s->order, s->objects);
 519         if (s->hwcache_align)
 520                 printf("** Hardware cacheline aligned\n");
 521         if (s->cache_dma)
 522                 printf("** Memory is allocated in a special DMA zone\n");
 523         if (s->destroy_by_rcu)
 524                 printf("** Slabs are destroyed via RCU\n");
 525         if (s->reclaim_account)
 526                 printf("** Reclaim accounting active\n");
 527
 528         printf("\nSizes (bytes)     Slabs              Debug                Memory\n");
 529         printf("------------------------------------------------------------------------\n");
 530         printf("Object : %7d  Total  : %7ld   Sanity Checks : %s  Total: %7ld\n",
 531                         s->object_size, s->slabs, onoff(s->sanity_checks),
 532                         s->slabs * (page_size << s->order));
 533         printf("SlabObj: %7d  Full   : %7ld   Redzoning     : %s  Used : %7ld\n",
 534                         s->slab_size, s->slabs - s->partial - s->cpu_slabs,
 535                         onoff(s->red_zone), s->objects * s->object_size);
 536         printf("SlabSiz: %7d  Partial: %7ld   Poisoning     : %s  Loss : %7ld\n",
 537                         page_size << s->order, s->partial, onoff(s->poison),
 538                         s->slabs * (page_size << s->order) - s->objects * s->object_size);
 539         printf("Loss   : %7d  CpuSlab: %7d   Tracking      : %s  Lalig: %7ld\n",
 540                         s->slab_size - s->object_size, s->cpu_slabs, onoff(s->store_user),
 541                         (s->slab_size - s->object_size) * s->objects);
 542         printf("Align  : %7d  Objects: %7d   Tracing       : %s  Lpadd: %7ld\n",
 543                         s->align, s->objs_per_slab, onoff(s->trace),
 544                         ((page_size << s->order) - s->objs_per_slab * s->slab_size) *
 545                         s->slabs);
 546
 547         ops(s);
 548         show_tracking(s);
 549         slab_numa(s, 1);
 550         slab_stats(s);
 551 }
 552
 553 static void slabcache(struct slabinfo *s)
 554 {
 555         char size_str[20];
 556         char dist_str[40];
 557         char flags[20];
 558         char *p = flags;
 559
 560         if (strcmp(s->name, "*") == 0)
 561                 return;
 562
 563         if (actual_slabs == 1) {
 564                 report(s);
 565                 return;
 566         }
 567
 568         if (skip_zero && !show_empty && !s->slabs)
 569                 return;
 570
 571         if (show_empty && s->slabs)
 572                 return;
 573
 574         if (sort_loss == 0)
 575                 store_size(size_str, slab_size(s));
 576         else
 577                 store_size(size_str, slab_waste(s));
 578         snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
 579                                                 s->partial, s->cpu_slabs);
 580
 581         if (!line++)
 582                 first_line();
 583
 584         if (s->aliases)
 585                 *p++ = '*';
 586         if (s->cache_dma)
 587                 *p++ = 'd';
 588         if (s->hwcache_align)
 589                 *p++ = 'A';
 590         if (s->poison)
 591                 *p++ = 'P';
 592         if (s->reclaim_account)
 593                 *p++ = 'a';
 594         if (s->red_zone)
 595                 *p++ = 'Z';
 596         if (s->sanity_checks)
 597                 *p++ = 'F';
 598         if (s->store_user)
 599                 *p++ = 'U';
 600         if (s->trace)
 601                 *p++ = 'T';
 602
 603         *p = 0;
 604         if (show_activity) {
 605                 unsigned long total_alloc;
 606                 unsigned long total_free;
 607
 608                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
 609                 total_free = s->free_fastpath + s->free_slowpath;
 610
 611                 printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
 612                         s->name, s->objects,
 613                         total_alloc, total_free,
 614                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
 615                         total_free ? (s->free_fastpath * 100 / total_free) : 0,
 616                         s->order_fallback, s->order, s->cmpxchg_double_fail,
 617                         s->cmpxchg_double_cpu_fail);
 618         }
 619         else
 620                 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
 621                         s->name, s->objects, s->object_size, size_str, dist_str,
 622                         s->objs_per_slab, s->order,
 623                         s->slabs ? (s->partial * 100) / s->slabs : 100,
 624                         s->slabs ? (s->objects * s->object_size * 100) /
 625                                 (s->slabs * (page_size << s->order)) : 100,
 626                         flags);
 627 }
 628
 629 /*
 630  * Analyze debug options. Return false if something is amiss.
 631  */
 632 static int debug_opt_scan(char *opt)
 633 {
 634         if (!opt || !opt[0] || strcmp(opt, "-") == 0)
 635                 return 1;
 636
 637         if (strcasecmp(opt, "a") == 0) {
 638                 sanity = 1;
 639                 poison = 1;
 640                 redzone = 1;
 641                 tracking = 1;
 642                 return 1;
 643         }
 644
 645         for ( ; *opt; opt++)
 646                 switch (*opt) {
 647                 case 'F' : case 'f':
 648                         if (sanity)
 649                                 return 0;
 650                         sanity = 1;
 651                         break;
 652                 case 'P' : case 'p':
 653                         if (poison)
 654                                 return 0;
 655                         poison = 1;
 656                         break;
 657
 658                 case 'Z' : case 'z':
 659                         if (redzone)
 660                                 return 0;
 661                         redzone = 1;
 662                         break;
 663
 664                 case 'U' : case 'u':
 665                         if (tracking)
 666                                 return 0;
 667                         tracking = 1;
 668                         break;
 669
 670                 case 'T' : case 't':
 671                         if (tracing)
 672                                 return 0;
 673                         tracing = 1;
 674                         break;
 675                 default:
 676                         return 0;
 677                 }
 678         return 1;
 679 }
 680
 681 static int slab_empty(struct slabinfo *s)
 682 {
 683         if (s->objects > 0)
 684                 return 0;
 685
 686         /*
 687          * We may still have slabs even if there are no objects. Shrinking will
 688          * remove them.
 689          */
 690         if (s->slabs != 0)
 691                 set_obj(s, "shrink", 1);
 692
 693         return 1;
 694 }
 695
 696 static void slab_debug(struct slabinfo *s)
 697 {
 698         if (strcmp(s->name, "*") == 0)
 699                 return;
 700
 701         if (sanity && !s->sanity_checks) {
 702                 set_obj(s, "sanity", 1);
 703         }
 704         if (!sanity && s->sanity_checks) {
 705                 if (slab_empty(s))
 706                         set_obj(s, "sanity", 0);
 707                 else
 708                         fprintf(stderr, "%s not empty cannot disable sanity checks\n", s->name);
 709         }
 710         if (redzone && !s->red_zone) {
 711                 if (slab_empty(s))
 712                         set_obj(s, "red_zone", 1);
 713                 else
 714                         fprintf(stderr, "%s not empty cannot enable redzoning\n", s->name);
 715         }
 716         if (!redzone && s->red_zone) {
 717                 if (slab_empty(s))
 718                         set_obj(s, "red_zone", 0);
 719                 else
 720                         fprintf(stderr, "%s not empty cannot disable redzoning\n", s->name);
 721         }
 722         if (poison && !s->poison) {
 723                 if (slab_empty(s))
 724                         set_obj(s, "poison", 1);
 725                 else
 726                         fprintf(stderr, "%s not empty cannot enable poisoning\n", s->name);
 727         }
 728         if (!poison && s->poison) {
 729                 if (slab_empty(s))
 730                         set_obj(s, "poison", 0);
 731                 else
 732                         fprintf(stderr, "%s not empty cannot disable poisoning\n", s->name);
 733         }
 734         if (tracking && !s->store_user) {
 735                 if (slab_empty(s))
 736                         set_obj(s, "store_user", 1);
 737                 else
 738                         fprintf(stderr, "%s not empty cannot enable tracking\n", s->name);
 739         }
 740         if (!tracking && s->store_user) {
 741                 if (slab_empty(s))
 742                         set_obj(s, "store_user", 0);
 743                 else
 744                         fprintf(stderr, "%s not empty cannot disable tracking\n", s->name);
 745         }
 746         if (tracing && !s->trace) {
 747                 if (slabs == 1)
 748                         set_obj(s, "trace", 1);
 749                 else
 750                         fprintf(stderr, "%s can only enable trace for one slab at a time\n", s->name);
 751         }
 752         if (!tracing && s->trace)
 753                 set_obj(s, "trace", 1);
 754 }
 755
 756 static void totals(void)
 757 {
 758         struct slabinfo *s;
 759
 760         int used_slabs = 0;
 761         char b1[20], b2[20], b3[20], b4[20];
 762         unsigned long long max = 1ULL << 63;
 763
 764         /* Object size */
 765         unsigned long long min_objsize = max, max_objsize = 0, avg_objsize;
 766
 767         /* Number of partial slabs in a slabcache */
 768         unsigned long long min_partial = max, max_partial = 0,
 769                                 avg_partial, total_partial = 0;
 770
 771         /* Number of slabs in a slab cache */
 772         unsigned long long min_slabs = max, max_slabs = 0,
 773                                 avg_slabs, total_slabs = 0;
 774
 775         /* Size of the whole slab */
 776         unsigned long long min_size = max, max_size = 0,
 777                                 avg_size, total_size = 0;
 778
 779         /* Bytes used for object storage in a slab */
 780         unsigned long long min_used = max, max_used = 0,
 781                                 avg_used, total_used = 0;
 782
 783         /* Waste: Bytes used for alignment and padding */
 784         unsigned long long min_waste = max, max_waste = 0,
 785                                 avg_waste, total_waste = 0;
 786         /* Number of objects in a slab */
 787         unsigned long long min_objects = max, max_objects = 0,
 788                                 avg_objects, total_objects = 0;
 789         /* Waste per object */
 790         unsigned long long min_objwaste = max,
 791                                 max_objwaste = 0, avg_objwaste,
 792                                 total_objwaste = 0;
 793
 794         /* Memory per object */
 795         unsigned long long min_memobj = max,
 796                                 max_memobj = 0, avg_memobj,
 797                                 total_objsize = 0;
 798
 799         /* Percentage of partial slabs per slab */
 800         unsigned long min_ppart = 100, max_ppart = 0,
 801                                 avg_ppart, total_ppart = 0;
 802
 803         /* Number of objects in partial slabs */
 804         unsigned long min_partobj = max, max_partobj = 0,
 805                                 avg_partobj, total_partobj = 0;
 806
 807         /* Percentage of partial objects of all objects in a slab */
 808         unsigned long min_ppartobj = 100, max_ppartobj = 0,
 809                                 avg_ppartobj, total_ppartobj = 0;
 810
 811
 812         for (s = slabinfo; s < slabinfo + slabs; s++) {
 813                 unsigned long long size;
 814                 unsigned long used;
 815                 unsigned long long wasted;
 816                 unsigned long long objwaste;
 817                 unsigned long percentage_partial_slabs;
 818                 unsigned long percentage_partial_objs;
 819
 820                 if (!s->slabs || !s->objects)
 821                         continue;
 822
 823                 used_slabs++;
 824
 825                 size = slab_size(s);
 826                 used = s->objects * s->object_size;
 827                 wasted = size - used;
 828                 objwaste = s->slab_size - s->object_size;
 829
 830                 percentage_partial_slabs = s->partial * 100 / s->slabs;
 831                 if (percentage_partial_slabs > 100)
 832                         percentage_partial_slabs = 100;
 833
 834                 percentage_partial_objs = s->objects_partial * 100
 835                                                         / s->objects;
 836
 837                 if (percentage_partial_objs > 100)
 838                         percentage_partial_objs = 100;
 839
 840                 if (s->object_size < min_objsize)
 841                         min_objsize = s->object_size;
 842                 if (s->partial < min_partial)
 843                         min_partial = s->partial;
 844                 if (s->slabs < min_slabs)
 845                         min_slabs = s->slabs;
 846                 if (size < min_size)
 847                         min_size = size;
 848                 if (wasted < min_waste)
 849                         min_waste = wasted;
 850                 if (objwaste < min_objwaste)
 851                         min_objwaste = objwaste;
 852                 if (s->objects < min_objects)
 853                         min_objects = s->objects;
 854                 if (used < min_used)
 855                         min_used = used;
 856                 if (s->objects_partial < min_partobj)
 857                         min_partobj = s->objects_partial;
 858                 if (percentage_partial_slabs < min_ppart)
 859                         min_ppart = percentage_partial_slabs;
 860                 if (percentage_partial_objs < min_ppartobj)
 861                         min_ppartobj = percentage_partial_objs;
 862                 if (s->slab_size < min_memobj)
 863                         min_memobj = s->slab_size;
 864
 865                 if (s->object_size > max_objsize)
 866                         max_objsize = s->object_size;
 867                 if (s->partial > max_partial)
 868                         max_partial = s->partial;
 869                 if (s->slabs > max_slabs)
 870                         max_slabs = s->slabs;
 871                 if (size > max_size)
 872                         max_size = size;
 873                 if (wasted > max_waste)
 874                         max_waste = wasted;
 875                 if (objwaste > max_objwaste)
 876                         max_objwaste = objwaste;
 877                 if (s->objects > max_objects)
 878                         max_objects = s->objects;
 879                 if (used > max_used)
 880                         max_used = used;
 881                 if (s->objects_partial > max_partobj)
 882                         max_partobj = s->objects_partial;
 883                 if (percentage_partial_slabs > max_ppart)
 884                         max_ppart = percentage_partial_slabs;
 885                 if (percentage_partial_objs > max_ppartobj)
 886                         max_ppartobj = percentage_partial_objs;
 887                 if (s->slab_size > max_memobj)
 888                         max_memobj = s->slab_size;
 889
 890                 total_partial += s->partial;
 891                 total_slabs += s->slabs;
 892                 total_size += size;
 893                 total_waste += wasted;
 894
 895                 total_objects += s->objects;
 896                 total_used += used;
 897                 total_partobj += s->objects_partial;
 898                 total_ppart += percentage_partial_slabs;
 899                 total_ppartobj += percentage_partial_objs;
 900
 901                 total_objwaste += s->objects * objwaste;
 902                 total_objsize += s->objects * s->slab_size;
 903         }
 904
 905         if (!total_objects) {
 906                 printf("No objects\n");
 907                 return;
 908         }
 909         if (!used_slabs) {
 910                 printf("No slabs\n");
 911                 return;
 912         }
 913
 914         /* Per slab averages */
 915         avg_partial = total_partial / used_slabs;
 916         avg_slabs = total_slabs / used_slabs;
 917         avg_size = total_size / used_slabs;
 918         avg_waste = total_waste / used_slabs;
 919
 920         avg_objects = total_objects / used_slabs;
 921         avg_used = total_used / used_slabs;
 922         avg_partobj = total_partobj / used_slabs;
 923         avg_ppart = total_ppart / used_slabs;
 924         avg_ppartobj = total_ppartobj / used_slabs;
 925
 926         /* Per object object sizes */
 927         avg_objsize = total_used / total_objects;
 928         avg_objwaste = total_objwaste / total_objects;
 929         avg_partobj = total_partobj * 100 / total_objects;
 930         avg_memobj = total_objsize / total_objects;
 931
 932         printf("Slabcache Totals\n");
 933         printf("----------------\n");
 934         printf("Slabcaches : %3d      Aliases  : %3d->%-3d Active: %3d\n",
 935                         slabs, aliases, alias_targets, used_slabs);
 936
 937         store_size(b1, total_size);store_size(b2, total_waste);
 938         store_size(b3, total_waste * 100 / total_used);
 939         printf("Memory used: %6s   # Loss   : %6s   MRatio:%6s%%\n", b1, b2, b3);
 940
 941         store_size(b1, total_objects);store_size(b2, total_partobj);
 942         store_size(b3, total_partobj * 100 / total_objects);
 943         printf("# Objects  : %6s   # PartObj: %6s   ORatio:%6s%%\n", b1, b2, b3);
 944
 945         printf("\n");
 946         printf("Per Cache    Average         Min         Max       Total\n");
 947         printf("---------------------------------------------------------\n");
 948
 949         store_size(b1, avg_objects);store_size(b2, min_objects);
 950         store_size(b3, max_objects);store_size(b4, total_objects);
 951         printf("#Objects  %10s  %10s  %10s  %10s\n",
 952                         b1,     b2,     b3,     b4);
 953
 954         store_size(b1, avg_slabs);store_size(b2, min_slabs);
 955         store_size(b3, max_slabs);store_size(b4, total_slabs);
 956         printf("#Slabs    %10s  %10s  %10s  %10s\n",
 957                         b1,     b2,     b3,     b4);
 958
 959         store_size(b1, avg_partial);store_size(b2, min_partial);
 960         store_size(b3, max_partial);store_size(b4, total_partial);
 961         printf("#PartSlab %10s  %10s  %10s  %10s\n",
 962                         b1,     b2,     b3,     b4);
 963         store_size(b1, avg_ppart);store_size(b2, min_ppart);
 964         store_size(b3, max_ppart);
 965         store_size(b4, total_partial * 100  / total_slabs);
 966         printf("%%PartSlab%10s%% %10s%% %10s%% %10s%%\n",
 967                         b1,     b2,     b3,     b4);
 968
 969         store_size(b1, avg_partobj);store_size(b2, min_partobj);
 970         store_size(b3, max_partobj);
 971         store_size(b4, total_partobj);
 972         printf("PartObjs  %10s  %10s  %10s  %10s\n",
 973                         b1,     b2,     b3,     b4);
 974
 975         store_size(b1, avg_ppartobj);store_size(b2, min_ppartobj);
 976         store_size(b3, max_ppartobj);
 977         store_size(b4, total_partobj * 100 / total_objects);
 978         printf("%% PartObj%10s%% %10s%% %10s%% %10s%%\n",
 979                         b1,     b2,     b3,     b4);
 980
 981         store_size(b1, avg_size);store_size(b2, min_size);
 982         store_size(b3, max_size);store_size(b4, total_size);
 983         printf("Memory    %10s  %10s  %10s  %10s\n",
 984                         b1,     b2,     b3,     b4);
 985
 986         store_size(b1, avg_used);store_size(b2, min_used);
 987         store_size(b3, max_used);store_size(b4, total_used);
 988         printf("Used      %10s  %10s  %10s  %10s\n",
 989                         b1,     b2,     b3,     b4);
 990
 991         store_size(b1, avg_waste);store_size(b2, min_waste);
 992         store_size(b3, max_waste);store_size(b4, total_waste);
 993         printf("Loss      %10s  %10s  %10s  %10s\n",
 994                         b1,     b2,     b3,     b4);
 995
 996         printf("\n");
 997         printf("Per Object   Average         Min         Max\n");
 998         printf("---------------------------------------------\n");
 999
1000         store_size(b1, avg_memobj);store_size(b2, min_memobj);
1001         store_size(b3, max_memobj);
1002         printf("Memory    %10s  %10s  %10s\n",
1003                         b1,     b2,     b3);
1004         store_size(b1, avg_objsize);store_size(b2, min_objsize);
1005         store_size(b3, max_objsize);
1006         printf("User      %10s  %10s  %10s\n",
1007                         b1,     b2,     b3);
1008
1009         store_size(b1, avg_objwaste);store_size(b2, min_objwaste);
1010         store_size(b3, max_objwaste);
1011         printf("Loss      %10s  %10s  %10s\n",
1012                         b1,     b2,     b3);
1013 }
1014
1015 static void sort_slabs(void)
1016 {
1017         struct slabinfo *s1,*s2;
1018
1019         for (s1 = slabinfo; s1 < slabinfo + slabs; s1++) {
1020                 for (s2 = s1 + 1; s2 < slabinfo + slabs; s2++) {
1021                         int result;
1022
1023                         if (sort_size)
1024                                 result = slab_size(s1) < slab_size(s2);
1025                         else if (sort_active)
1026                                 result = slab_activity(s1) < slab_activity(s2);
1027                         else if (sort_loss)
1028                                 result = slab_waste(s1) < slab_waste(s2);
1029                         else
1030                                 result = strcasecmp(s1->name, s2->name);
1031
1032                         if (show_inverted)
1033                                 result = -result;
1034
1035                         if (result > 0) {
1036                                 struct slabinfo t;
1037
1038                                 memcpy(&t, s1, sizeof(struct slabinfo));
1039                                 memcpy(s1, s2, sizeof(struct slabinfo));
1040                                 memcpy(s2, &t, sizeof(struct slabinfo));
1041                         }
1042                 }
1043         }
1044 }
1045
1046 static void sort_aliases(void)
1047 {
1048         struct aliasinfo *a1,*a2;
1049
1050         for (a1 = aliasinfo; a1 < aliasinfo + aliases; a1++) {
1051                 for (a2 = a1 + 1; a2 < aliasinfo + aliases; a2++) {
1052                         char *n1, *n2;
1053
1054                         n1 = a1->name;
1055                         n2 = a2->name;
1056                         if (show_alias && !show_inverted) {
1057                                 n1 = a1->ref;
1058                                 n2 = a2->ref;
1059                         }
1060                         if (strcasecmp(n1, n2) > 0) {
1061                                 struct aliasinfo t;
1062
1063                                 memcpy(&t, a1, sizeof(struct aliasinfo));
1064                                 memcpy(a1, a2, sizeof(struct aliasinfo));
1065                                 memcpy(a2, &t, sizeof(struct aliasinfo));
1066                         }
1067                 }
1068         }
1069 }
1070
1071 static void link_slabs(void)
1072 {
1073         struct aliasinfo *a;
1074         struct slabinfo *s;
1075
1076         for (a = aliasinfo; a < aliasinfo + aliases; a++) {
1077
1078                 for (s = slabinfo; s < slabinfo + slabs; s++)
1079                         if (strcmp(a->ref, s->name) == 0) {
1080                                 a->slab = s;
1081                                 s->refs++;
1082                                 break;
1083                         }
1084                 if (s == slabinfo + slabs)
1085                         fatal("Unresolved alias %s\n", a->ref);
1086         }
1087 }
1088
1089 static void alias(void)
1090 {
1091         struct aliasinfo *a;
1092         char *active = NULL;
1093
1094         sort_aliases();
1095         link_slabs();
1096
1097         for(a = aliasinfo; a < aliasinfo + aliases; a++) {
1098
1099                 if (!show_single_ref && a->slab->refs == 1)
1100                         continue;
1101
1102                 if (!show_inverted) {
1103                         if (active) {
1104                                 if (strcmp(a->slab->name, active) == 0) {
1105                                         printf(" %s", a->name);
1106                                         continue;
1107                                 }
1108                         }
1109                         printf("\n%-12s <- %s", a->slab->name, a->name);
1110                         active = a->slab->name;
1111                 }
1112                 else
1113                         printf("%-20s -> %s\n", a->name, a->slab->name);
1114         }
1115         if (active)
1116                 printf("\n");
1117 }
1118
1119
1120 static void rename_slabs(void)
1121 {
1122         struct slabinfo *s;
1123         struct aliasinfo *a;
1124
1125         for (s = slabinfo; s < slabinfo + slabs; s++) {
1126                 if (*s->name != ':')
1127                         continue;
1128
1129                 if (s->refs > 1 && !show_first_alias)
1130                         continue;
1131
1132                 a = find_one_alias(s);
1133
1134                 if (a)
1135                         s->name = a->name;
1136                 else {
1137                         s->name = "*";
1138                         actual_slabs--;
1139                 }
1140         }
1141 }
1142
1143 static int slab_mismatch(char *slab)
1144 {
1145         return regexec(&pattern, slab, 0, NULL, 0);
1146 }
1147
1148 static void read_slab_dir(void)
1149 {
1150         DIR *dir;
1151         struct dirent *de;
1152         struct slabinfo *slab = slabinfo;
1153         struct aliasinfo *alias = aliasinfo;
1154         char *p;
1155         char *t;
1156         int count;
1157
1158         if (chdir("/sys/kernel/slab") && chdir("/sys/slab"))
1159                 fatal("SYSFS support for SLUB not active\n");
1160
1161         dir = opendir(".");
1162         while ((de = readdir(dir))) {
1163                 if (de->d_name[0] == '.' ||
1164                         (de->d_name[0] != ':' && slab_mismatch(de->d_name)))
1165                                 continue;
1166                 switch (de->d_type) {
1167                    case DT_LNK:
1168                         alias->name = strdup(de->d_name);
1169                         count = readlink(de->d_name, buffer, sizeof(buffer)-1);
1170
1171                         if (count < 0)
1172                                 fatal("Cannot read symlink %s\n", de->d_name);
1173
1174                         buffer[count] = 0;
1175                         p = buffer + count;
1176                         while (p > buffer && p[-1] != '/')
1177                                 p--;
1178                         alias->ref = strdup(p);
1179                         alias++;
1180                         break;
1181                    case DT_DIR:
1182                         if (chdir(de->d_name))
1183                                 fatal("Unable to access slab %s\n", slab->name);
1184                         slab->name = strdup(de->d_name);
1185                         slab->alias = 0;
1186                         slab->refs = 0;
1187                         slab->aliases = get_obj("aliases");
1188                         slab->align = get_obj("align");
1189                         slab->cache_dma = get_obj("cache_dma");
1190                         slab->cpu_slabs = get_obj("cpu_slabs");
1191                         slab->destroy_by_rcu = get_obj("destroy_by_rcu");
1192                         slab->hwcache_align = get_obj("hwcache_align");
1193                         slab->object_size = get_obj("object_size");
1194                         slab->objects = get_obj("objects");
1195                         slab->objects_partial = get_obj("objects_partial");
1196                         slab->objects_total = get_obj("objects_total");
1197                         slab->objs_per_slab = get_obj("objs_per_slab");
1198                         slab->order = get_obj("order");
1199                         slab->partial = get_obj("partial");
1200                         slab->partial = get_obj_and_str("partial", &t);
1201                         decode_numa_list(slab->numa_partial, t);
1202                         free(t);
1203                         slab->poison = get_obj("poison");
1204                         slab->reclaim_account = get_obj("reclaim_account");
1205                         slab->red_zone = get_obj("red_zone");
1206                         slab->sanity_checks = get_obj("sanity_checks");
1207                         slab->slab_size = get_obj("slab_size");
1208                         slab->slabs = get_obj_and_str("slabs", &t);
1209                         decode_numa_list(slab->numa, t);
1210                         free(t);
1211                         slab->store_user = get_obj("store_user");
1212                         slab->trace = get_obj("trace");
1213                         slab->alloc_fastpath = get_obj("alloc_fastpath");
1214                         slab->alloc_slowpath = get_obj("alloc_slowpath");
1215                         slab->free_fastpath = get_obj("free_fastpath");
1216                         slab->free_slowpath = get_obj("free_slowpath");
1217                         slab->free_frozen= get_obj("free_frozen");
1218                         slab->free_add_partial = get_obj("free_add_partial");
1219                         slab->free_remove_partial = get_obj("free_remove_partial");
1220                         slab->alloc_from_partial = get_obj("alloc_from_partial");
1221                         slab->alloc_slab = get_obj("alloc_slab");
1222                         slab->alloc_refill = get_obj("alloc_refill");
1223                         slab->free_slab = get_obj("free_slab");
1224                         slab->cpuslab_flush = get_obj("cpuslab_flush");
1225                         slab->deactivate_full = get_obj("deactivate_full");
1226                         slab->deactivate_empty = get_obj("deactivate_empty");
1227                         slab->deactivate_to_head = get_obj("deactivate_to_head");
1228                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
1229                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
1230                         slab->order_fallback = get_obj("order_fallback");
1231                         slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
1232                         slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
1233                         slab->cpu_partial_alloc = get_obj("cpu_partial_alloc");
1234                         slab->cpu_partial_free = get_obj("cpu_partial_free");
1235                         slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
1236                         slab->deactivate_bypass = get_obj("deactivate_bypass");
1237                         chdir("..");
1238                         if (slab->name[0] == ':')
1239                                 alias_targets++;
1240                         slab++;
1241                         break;
1242                    default :
1243                         fatal("Unknown file type %lx\n", de->d_type);
1244                 }
1245         }
1246         closedir(dir);
1247         slabs = slab - slabinfo;
1248         actual_slabs = slabs;
1249         aliases = alias - aliasinfo;
1250         if (slabs > MAX_SLABS)
1251                 fatal("Too many slabs\n");
1252         if (aliases > MAX_ALIASES)
1253                 fatal("Too many aliases\n");
1254 }
1255
1256 static void output_slabs(void)
1257 {
1258         struct slabinfo *slab;
1259
1260         for (slab = slabinfo; (slab < slabinfo + slabs) &&
1261                         output_lines != 0; slab++) {
1262
1263                 if (slab->alias)
1264                         continue;
1265
1266                 if (output_lines != -1)
1267                         output_lines--;
1268
1269                 if (show_numa)
1270                         slab_numa(slab, 0);
1271                 else if (show_track)
1272                         show_tracking(slab);
1273                 else if (validate)
1274                         slab_validate(slab);
1275                 else if (shrink)
1276                         slab_shrink(slab);
1277                 else if (set_debug)
1278                         slab_debug(slab);
1279                 else if (show_ops)
1280                         ops(slab);
1281                 else if (show_slab)
1282                         slabcache(slab);
1283                 else if (show_report)
1284                         report(slab);
1285         }
1286 }
1287
1288 struct option opts[] = {
1289         { "aliases", no_argument, NULL, 'a' },
1290         { "activity", no_argument, NULL, 'A' },
1291         { "debug", optional_argument, NULL, 'd' },
1292         { "display-activity", no_argument, NULL, 'D' },
1293         { "empty", no_argument, NULL, 'e' },
1294         { "first-alias", no_argument, NULL, 'f' },
1295         { "help", no_argument, NULL, 'h' },
1296         { "inverted", no_argument, NULL, 'i'},
1297         { "numa", no_argument, NULL, 'n' },
1298         { "ops", no_argument, NULL, 'o' },
1299         { "report", no_argument, NULL, 'r' },
1300         { "shrink", no_argument, NULL, 's' },
1301         { "slabs", no_argument, NULL, 'l' },
1302         { "track", no_argument, NULL, 't'},
1303         { "validate", no_argument, NULL, 'v' },
1304         { "zero", no_argument, NULL, 'z' },
1305         { "1ref", no_argument, NULL, '1'},
1306         { "lines", required_argument, NULL, 'N'},
1307         { "Loss", no_argument, NULL, 'L'},
1308         { NULL, 0, NULL, 0 }
1309 };
1310
1311 int main(int argc, char *argv[])
1312 {
1313         int c;
1314         int err;
1315         char *pattern_source;
1316
1317         page_size = getpagesize();
1318
1319         while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:L",
1320                                                 opts, NULL)) != -1)
1321                 switch (c) {
1322                 case '1':
1323                         show_single_ref = 1;
1324                         break;
1325                 case 'a':
1326                         show_alias = 1;
1327                         break;
1328                 case 'A':
1329                         sort_active = 1;
1330                         break;
1331                 case 'd':
1332                         set_debug = 1;
1333                         if (!debug_opt_scan(optarg))
1334                                 fatal("Invalid debug option '%s'\n", optarg);
1335                         break;
1336                 case 'D':
1337                         show_activity = 1;
1338                         break;
1339                 case 'e':
1340                         show_empty = 1;
1341                         break;
1342                 case 'f':
1343                         show_first_alias = 1;
1344                         break;
1345                 case 'h':
1346                         usage();
1347                         return 0;
1348                 case 'i':
1349                         show_inverted = 1;
1350                         break;
1351                 case 'n':
1352                         show_numa = 1;
1353                         break;
1354                 case 'o':
1355                         show_ops = 1;
1356                         break;
1357                 case 'r':
1358                         show_report = 1;
1359                         break;
1360                 case 's':
1361                         shrink = 1;
1362                         break;
1363                 case 'l':
1364                         show_slab = 1;
1365                         break;
1366                 case 't':
1367                         show_track = 1;
1368                         break;
1369                 case 'v':
1370                         validate = 1;
1371                         break;
1372                 case 'z':
1373                         skip_zero = 0;
1374                         break;
1375                 case 'T':
1376                         show_totals = 1;
1377                         break;
1378                 case 'S':
1379                         sort_size = 1;
1380                         break;
1381                 case 'N':
1382                         if (optarg) {
1383                                 output_lines = atoi(optarg);
1384                                 if (output_lines < 1)
1385                                         output_lines = 1;
1386                         }
1387                         break;
1388                 case 'L':
1389                         sort_loss = 1;
1390                         break;
1391                 default:
1392                         fatal("%s: Invalid option '%c'\n", argv[0], optopt);
1393
1394         }
1395
1396         if (!show_slab && !show_alias && !show_track && !show_report
1397                 && !validate && !shrink && !set_debug && !show_ops)
1398                         show_slab = 1;
1399
1400         if (argc > optind)
1401                 pattern_source = argv[optind];
1402         else
1403                 pattern_source = ".*";
1404
1405         err = regcomp(&pattern, pattern_source, REG_ICASE|REG_NOSUB);
1406         if (err)
1407                 fatal("%s: Invalid pattern '%s' code %d\n",
1408                         argv[0], pattern_source, err);
1409         read_slab_dir();
1410         if (show_alias)
1411                 alias();
1412         else
1413         if (show_totals)
1414                 totals();
1415         else {
1416                 link_slabs();
1417                 rename_slabs();
1418                 sort_slabs();
1419                 output_slabs();
1420         }
1421         return 0;
1422 }