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mm: add context argument to shrinker callback

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The current shrinker implementation requires the registered callback
to have global state to work from. This makes it difficult to shrink
caches that are not global (e.g. per-filesystem caches). Pass the shrinker
structure to the callback so that users can embed the shrinker structure
in the context the shrinker needs to operate on and get back to it in the
callback via container_of().

Signed-off-by: Dave Chinner <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
This commit is contained in:
Dave Chinner 2010-07-19 14:56:17 +10:00 • committed by Dave Chinner
commit 7f8275d0d6
18 changed files with 31 additions and 22 deletions
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2
fs/nfs/dir.c
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@ -1710,7 +1710,7 @@ static void nfs_access_free_list(struct list_head *head)
}
}
int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask)
int nfs_access_cache_shrinker(struct shrinker *shrink, int nr_to_scan, gfp_t gfp_mask)
{
LIST_HEAD(head);
struct nfs_inode *nfsi;

3
fs/nfs/internal.h
View file

@ -205,7 +205,8 @@ extern struct rpc_procinfo nfs4_procedures[];
void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
/* dir.c */
extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask);
extern int nfs_access_cache_shrinker(struct shrinker *shrink,
int nr_to_scan, gfp_t gfp_mask);
/* inode.c */
extern struct workqueue_struct *nfsiod_workqueue;