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authorDavid Chinner <dgc@sgi.com>2007-08-16 01:21:11 -0400
committerTim Shimmin <tes@chook.melbourne.sgi.com>2007-09-17 02:42:02 -0400
commit65de5567564e70edd01b6d4e95e548d7ba284872 (patch)
tree977aef83761c4ef87d95f1e192bc1ae9c7cbdeac /fs/xfs/xfs_mru_cache.h
parentc2f828977ba5d17c13debba374ea252d18e5ccfb (diff)
[XFS] On-demand reaping of the MRU cache
Instead of running the mru cache reaper all the time based on a timeout, we should only run it when the cache has active objects. This allows CPUs to sleep when there is no activity rather than be woken repeatedly just to check if there is anything to do. SGI-PV: 968554 SGI-Modid: xfs-linux-melb:xfs-kern:29305a Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Donald Douwsma <donaldd@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_mru_cache.h')
-rw-r--r--fs/xfs/xfs_mru_cache.h6
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/xfs/xfs_mru_cache.h b/fs/xfs/xfs_mru_cache.h
index 624fd10ee8e5..dd58ea1bbebe 100644
--- a/fs/xfs/xfs_mru_cache.h
+++ b/fs/xfs/xfs_mru_cache.h
@@ -32,11 +32,9 @@ typedef struct xfs_mru_cache
32 unsigned int grp_time; /* Time period spanned by grps. */ 32 unsigned int grp_time; /* Time period spanned by grps. */
33 unsigned int lru_grp; /* Group containing time zero. */ 33 unsigned int lru_grp; /* Group containing time zero. */
34 unsigned long time_zero; /* Time first element was added. */ 34 unsigned long time_zero; /* Time first element was added. */
35 unsigned long next_reap; /* Time that the reaper should
36 next do something. */
37 unsigned int reap_all; /* if set, reap all lists */
38 xfs_mru_cache_free_func_t free_func; /* Function pointer for freeing. */ 35 xfs_mru_cache_free_func_t free_func; /* Function pointer for freeing. */
39 struct delayed_work work; /* Workqueue data for reaping. */ 36 struct delayed_work work; /* Workqueue data for reaping. */
37 unsigned int queued; /* work has been queued */
40} xfs_mru_cache_t; 38} xfs_mru_cache_t;
41 39
42int xfs_mru_cache_init(void); 40int xfs_mru_cache_init(void);
@@ -44,7 +42,7 @@ void xfs_mru_cache_uninit(void);
44int xfs_mru_cache_create(struct xfs_mru_cache **mrup, unsigned int lifetime_ms, 42int xfs_mru_cache_create(struct xfs_mru_cache **mrup, unsigned int lifetime_ms,
45 unsigned int grp_count, 43 unsigned int grp_count,
46 xfs_mru_cache_free_func_t free_func); 44 xfs_mru_cache_free_func_t free_func);
47void xfs_mru_cache_flush(xfs_mru_cache_t *mru, int restart); 45void xfs_mru_cache_flush(xfs_mru_cache_t *mru);
48void xfs_mru_cache_destroy(struct xfs_mru_cache *mru); 46void xfs_mru_cache_destroy(struct xfs_mru_cache *mru);
49int xfs_mru_cache_insert(struct xfs_mru_cache *mru, unsigned long key, 47int xfs_mru_cache_insert(struct xfs_mru_cache *mru, unsigned long key,
50 void *value); 48 void *value);