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vmscan: change shrink_slab() interfaces by passing shrink_control

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Consolidate the existing parameters to shrink_slab() into a new
shrink_control struct.  This is needed later to pass the same struct to
shrinkers.

Signed-off-by: Ying Han <yinghan@google.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Minchan Kim <minchan.kim@gmail.com>
Acked-by: Pavel Emelyanov <xemul@openvz.org>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Acked-by: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ying Han 2011-05-24 17:12:26 -07:00 • committed by Linus Torvalds
parent 7b1de5868b
commit a09ed5e000
4 changed files with 55 additions and 17 deletions
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13
include/linux/mm.h
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@ -1161,6 +1161,15 @@ static inline void sync_mm_rss(struct task_struct *task, struct mm_struct *mm)
}
#endif
/*
* This struct is used to pass information from page reclaim to the shrinkers.
* We consolidate the values for easier extention later.
*/
struct shrink_control {
unsigned long nr_scanned;
gfp_t gfp_mask;
};
/*
* A callback you can register to apply pressure to ageable caches.
*
@ -1630,8 +1639,8 @@ int in_gate_area_no_mm(unsigned long addr);
int drop_caches_sysctl_handler(struct ctl_table *, int,
void __user *, size_t *, loff_t *);
unsigned long shrink_slab(unsigned long scanned, gfp_t gfp_mask,
unsigned long lru_pages);
unsigned long shrink_slab(struct shrink_control *shrink,
unsigned long lru_pages);
#ifndef CONFIG_MMU
#define randomize_va_space 0