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| author | Joe Thornber <ejt@redhat.com> | 2012-07-27 18:07:58 +0400 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2012-07-27 18:07:58 +0400 |
| commit | 8c971178a788c70e8d6db5c3a813de1a1f54e5b7 (patch) | |
| tree | d909d1e3aae1ce0cf2ca92be709ffc8405ba0aa8 /drivers/md/dm-thin-metadata.c | |
| parent | d973ac196b7668c198f3c1338d8b07c13a3e7713 (diff) | |
| download | linux-8c971178a788c70e8d6db5c3a813de1a1f54e5b7.tar.xz | |
dm thin metadata: introduce THIN_MAX_CONCURRENT_LOCKS
Introduce THIN_MAX_CONCURRENT_LOCKS into dm-thin-metadata to
give a name to an otherwise "magic" number.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-thin-metadata.c')
| -rw-r--r-- | drivers/md/dm-thin-metadata.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c index acd89ec825d5..31f9827dfb56 100644 --- a/drivers/md/dm-thin-metadata.c +++ b/drivers/md/dm-thin-metadata.c @@ -80,6 +80,12 @@ #define THIN_METADATA_CACHE_SIZE 64 #define SECTOR_TO_BLOCK_SHIFT 3 +/* + * 3 for btree insert + + * 2 for btree lookup used within space map + */ +#define THIN_MAX_CONCURRENT_LOCKS 5 + /* This should be plenty */ #define SPACE_MAP_ROOT_SIZE 128 @@ -668,13 +674,9 @@ struct dm_pool_metadata *dm_pool_metadata_open(struct block_device *bdev, return ERR_PTR(-ENOMEM); } - /* - * Max hex locks: - * 3 for btree insert + - * 2 for btree lookup used within space map - */ bm = dm_block_manager_create(bdev, THIN_METADATA_BLOCK_SIZE, - THIN_METADATA_CACHE_SIZE, 5); + THIN_METADATA_CACHE_SIZE, + THIN_MAX_CONCURRENT_LOCKS); if (!bm) { DMERR("could not create block manager"); kfree(pmd); |