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| author | Daniel Phillips <phillips@google.com> | 2006-03-11 02:08:16 (GMT) |
|---|---|---|
| committer | Mark Fasheh <mark.fasheh@oracle.com> | 2006-06-26 21:42:42 (GMT) |
| commit | 03d864c02c3ea803b1718940ac6953a257182d7a (patch) | |
| tree | 2678c34a75654693ee875d20194830429886ec58 /fs/ocfs2/dlm/dlmcommon.h | |
| parent | 95c4f581d6551de55cf5b8693db98b01ce07021b (diff) | |
| download | linux-03d864c02c3ea803b1718940ac6953a257182d7a.tar.xz | |
ocfs2: allocate lockres hash pages in an array
This allows us to have a hash table greater than a single page which greatly
improves dlm performance on some tests.
Signed-off-by: Daniel Phillips <phillips@google.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/dlm/dlmcommon.h')
| -rw-r--r-- | fs/ocfs2/dlm/dlmcommon.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h index 8761281..0378ddb 100644 --- a/fs/ocfs2/dlm/dlmcommon.h +++ b/fs/ocfs2/dlm/dlmcommon.h @@ -37,7 +37,10 @@ #define DLM_THREAD_SHUFFLE_INTERVAL 5 // flush everything every 5 passes #define DLM_THREAD_MS 200 // flush at least every 200 ms -#define DLM_HASH_BUCKETS (PAGE_SIZE / sizeof(struct hlist_head)) +#define DLM_HASH_SIZE (1 << 14) +#define DLM_HASH_PAGES (DLM_HASH_SIZE / PAGE_SIZE) +#define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head)) +#define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE) /* Intended to make it easier for us to switch out hash functions */ #define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l) @@ -88,7 +91,7 @@ enum dlm_ctxt_state { struct dlm_ctxt { struct list_head list; - struct hlist_head *lockres_hash; + struct hlist_head **lockres_hash; struct list_head dirty_list; struct list_head purge_list; struct list_head pending_asts; @@ -135,6 +138,11 @@ struct dlm_ctxt struct list_head dlm_eviction_callbacks; }; +static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i) +{ + return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE); +} + /* these keventd work queue items are for less-frequently * called functions that cannot be directly called from the * net message handlers for some reason, usually because |