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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/gfs2/glock.c
View file

@ -1358,7 +1358,7 @@ void gfs2_glock_complete(struct gfs2_glock *gl, int ret)
}
static int gfs2_shrink_glock_memory(int nr, gfp_t gfp_mask)
static int gfs2_shrink_glock_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask)
{
struct gfs2_glock *gl;
int may_demote;

2
fs/gfs2/quota.c
View file

@ -77,7 +77,7 @@ static LIST_HEAD(qd_lru_list);
static atomic_t qd_lru_count = ATOMIC_INIT(0);
static DEFINE_SPINLOCK(qd_lru_lock);
int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask)
int gfs2_shrink_qd_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask)
{
struct gfs2_quota_data *qd;
struct gfs2_sbd *sdp;

2
fs/gfs2/quota.h
View file

@ -51,7 +51,7 @@ static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
return ret;
}
extern int gfs2_shrink_qd_memory(int nr, gfp_t gfp_mask);
extern int gfs2_shrink_qd_memory(struct shrinker *shrink, int nr, gfp_t gfp_mask);
extern const struct quotactl_ops gfs2_quotactl_ops;
#endif /* __QUOTA_DOT_H__ */