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vmscan: use atomic-long for shrinker batching

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Use atomic-long operations instead of looping around cmpxchg().

[akpm@linux-foundation.org: massage atomic.h inclusions]
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Konstantin Khlebnikov 2011-12-08 14:33:54 -08:00 • committed by Linus Torvalds
commit 83aeeada7c
4 changed files with 10 additions and 12 deletions
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2
include/linux/fs.h
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@ -393,8 +393,8 @@ struct inodes_stat_t {
#include <linux/semaphore.h>
#include <linux/fiemap.h>
#include <linux/rculist_bl.h>
#include <linux/shrinker.h>
#include <linux/atomic.h>
#include <linux/shrinker.h>
#include <asm/byteorder.h>

1
include/linux/mm.h
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@ -10,6 +10,7 @@
#include <linux/mmzone.h>
#include <linux/rbtree.h>
#include <linux/prio_tree.h>
#include <linux/atomic.h>
#include <linux/debug_locks.h>
#include <linux/mm_types.h>
#include <linux/range.h>

2
include/linux/shrinker.h
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@ -35,7 +35,7 @@ struct shrinker {
/* These are for internal use */
struct list_head list;
long nr; /* objs pending delete */
atomic_long_t nr_in_batch; /* objs pending delete */
};
#define DEFAULT_SEEKS 2 /* A good number if you don't know better. */
extern void register_shrinker(struct shrinker *);