From: 黄涛 <huangtao@rock-chips.com>
Date: Sat, 30 Jul 2011 15:09:46 +0000 (+0800)
Subject: Revert "mm: Add min_free_order_shift tunable."
X-Git-Tag: firefly_0821_release~9844
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3e094af87e499bc97b41da29f67ea263f4df39a8;p=firefly-linux-kernel-4.4.55.git

Revert "mm: Add min_free_order_shift tunable."

This reverts commit c177d04116de6acff4d41706df54cf6c909aa5a2.
---

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 79d527a99561..0d949c517412 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -79,7 +79,6 @@ extern char core_pattern[];
 extern unsigned int core_pipe_limit;
 extern int pid_max;
 extern int min_free_kbytes;
-extern int min_free_order_shift;
 extern int pid_max_min, pid_max_max;
 extern int sysctl_drop_caches;
 extern int percpu_pagelist_fraction;
@@ -1229,14 +1228,6 @@ static struct ctl_table vm_table[] = {
 		.strategy	= &sysctl_intvec,
 		.extra1		= &zero,
 	},
-	{
-		.ctl_name	= CTL_UNNUMBERED,
-		.procname	= "min_free_order_shift",
-		.data		= &min_free_order_shift,
-		.maxlen		= sizeof(min_free_order_shift),
-		.mode		= 0644,
-		.proc_handler	= &proc_dointvec
-	},
 	{
 		.ctl_name	= VM_PERCPU_PAGELIST_FRACTION,
 		.procname	= "percpu_pagelist_fraction",
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 70d43bf00dc6..2bc2ac63f41e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -122,7 +122,6 @@ static char * const zone_names[MAX_NR_ZONES] = {
 };
 
 int min_free_kbytes = 1024;
-int min_free_order_shift = 1;
 
 static unsigned long __meminitdata nr_kernel_pages;
 static unsigned long __meminitdata nr_all_pages;
@@ -1380,7 +1379,7 @@ int zone_watermark_ok(struct zone *z, int order, unsigned long mark,
 		free_pages -= z->free_area[o].nr_free << o;
 
 		/* Require fewer higher order pages to be free */
-		min >>= min_free_order_shift;
+		min >>= 1;
 
 		if (free_pages <= min)
 			return 0;