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| author | Joe Thornber <ejt@redhat.com> | 2014-10-06 16:30:06 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-11-10 15:25:26 -0500 |
| commit | a195db2d29a47c2c3a61386009bd400df18c86cf (patch) | |
| tree | 17f9c41a52fa28c6a03840a0df24a3781c280217 /drivers/md/dm-bio-prison.h | |
| parent | 33096a7822de63bc7dbdd090870b656a0304fa35 (diff) | |
| download | blackbird-op-linux-a195db2d29a47c2c3a61386009bd400df18c86cf.tar.gz blackbird-op-linux-a195db2d29a47c2c3a61386009bd400df18c86cf.zip | |
dm bio prison: switch to using a red black tree
Previously it was using a fixed sized hash table. There are times
when very many concurrent cells are held (such as when processing a very
large discard). When this happens the hash table performance becomes
very poor.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-bio-prison.h')
| -rw-r--r-- | drivers/md/dm-bio-prison.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/md/dm-bio-prison.h b/drivers/md/dm-bio-prison.h index 6805a142b750..997a43960e77 100644 --- a/drivers/md/dm-bio-prison.h +++ b/drivers/md/dm-bio-prison.h @@ -10,8 +10,8 @@ #include "persistent-data/dm-block-manager.h" /* FIXME: for dm_block_t */ #include "dm-thin-metadata.h" /* FIXME: for dm_thin_id */ -#include <linux/list.h> #include <linux/bio.h> +#include <linux/rbtree.h> /*----------------------------------------------------------------*/ @@ -35,13 +35,14 @@ struct dm_cell_key { * themselves. */ struct dm_bio_prison_cell { - struct hlist_node list; + struct rb_node node; + struct dm_cell_key key; struct bio *holder; struct bio_list bios; }; -struct dm_bio_prison *dm_bio_prison_create(unsigned nr_cells); +struct dm_bio_prison *dm_bio_prison_create(void); void dm_bio_prison_destroy(struct dm_bio_prison *prison); /* |
