Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

[firefly-linux-kernel-4.4.55.git] / lib / Kconfig.debug

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a28590083622705dd007bffd5d3a57f87f133fed..5f2ce616c0462db9b9055528110268385b2b653e 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -227,6 +227,22 @@ config UNUSED_SYMBOLS
          you really need it, and what the merge plan to the mainline kernel for
          your module is.
 
+config PAGE_OWNER
+       bool "Track page owner"
+       depends on DEBUG_KERNEL && STACKTRACE_SUPPORT
+       select DEBUG_FS
+       select STACKTRACE
+       select PAGE_EXTENSION
+       help
+         This keeps track of what call chain is the owner of a page, may
+         help to find bare alloc_page(s) leaks. Even if you include this
+         feature on your build, it is disabled in default. You should pass
+         "page_owner=on" to boot parameter in order to enable it. Eats
+         a fair amount of memory if enabled. See tools/vm/page_owner_sort.c
+         for user-space helper.
+
+         If unsure, say N.
+
 config DEBUG_FS
        bool "Debug Filesystem"
        help
@@ -824,6 +840,18 @@ config SCHEDSTATS
          application, you can say N to avoid the very slight overhead
          this adds.
 
+config SCHED_STACK_END_CHECK
+       bool "Detect stack corruption on calls to schedule()"
+       depends on DEBUG_KERNEL
+       default n
+       help
+         This option checks for a stack overrun on calls to schedule().
+         If the stack end location is found to be over written always panic as
+         the content of the corrupted region can no longer be trusted.
+         This is to ensure no erroneous behaviour occurs which could result in
+         data corruption or a sporadic crash at a later stage once the region
+         is examined. The runtime overhead introduced is minimal.
+
 config TIMER_STATS
        bool "Collect kernel timers statistics"
        depends on DEBUG_KERNEL && PROC_FS
@@ -952,7 +980,7 @@ config PROVE_LOCKING
         the proof of observed correctness is also maintained for an
         arbitrary combination of these separate locking variants.
 
-        For more details, see Documentation/lockdep-design.txt.
+        For more details, see Documentation/locking/lockdep-design.txt.
 
 config LOCKDEP
        bool
@@ -973,7 +1001,7 @@ config LOCK_STAT
        help
         This feature enables tracking lock contention points
 
-        For more details, see Documentation/lockstat.txt
+        For more details, see Documentation/locking/lockstat.txt
 
         This also enables lock events required by "perf lock",
         subcommand of perf.
@@ -1226,21 +1254,9 @@ config RCU_CPU_STALL_TIMEOUT
          RCU grace period persists, additional CPU stall warnings are
          printed at more widely spaced intervals.
 
-config RCU_CPU_STALL_VERBOSE
-       bool "Print additional per-task information for RCU_CPU_STALL_DETECTOR"
-       depends on TREE_PREEMPT_RCU
-       default y
-       help
-         This option causes RCU to printk detailed per-task information
-         for any tasks that are stalling the current RCU grace period.
-
-         Say N if you are unsure.
-
-         Say Y if you want to enable such checks.
-
 config RCU_CPU_STALL_INFO
        bool "Print additional diagnostics on RCU CPU stall"
-       depends on (TREE_RCU || TREE_PREEMPT_RCU) && DEBUG_KERNEL
+       depends on (TREE_RCU || PREEMPT_RCU) && DEBUG_KERNEL
        default n
        help
          For each stalled CPU that is aware of the current RCU grace
@@ -1636,7 +1652,7 @@ config DMA_API_DEBUG
 
          If unsure, say N.
 
-config TEST_MODULE
+config TEST_LKM
        tristate "Test module loading with 'hello world' module"
        default n
        depends on m
@@ -1672,7 +1688,8 @@ config TEST_BPF
          against the BPF interpreter or BPF JIT compiler depending on the
          current setting. This is in particular useful for BPF JIT compiler
          development, but also to run regression tests against changes in
-         the interpreter code.
+         the interpreter code. It also enables test stubs for eBPF maps and
+         verifier used by user space verifier testsuite.
 
          If unsure, say N.