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| author | Joe Thornber <ejt@redhat.com> | 2014-09-17 10:17:39 +0100 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2014-11-10 15:25:30 -0500 |
| commit | 5f274d886598c9fd26d2499bf3f68306f170e9db (patch) | |
| tree | af0ded19382c65e832ea51e2b01efb40581c81dd /drivers/md/dm-bio-prison.c | |
| parent | f1afb36a6102b52949c2c6d8eb250eddcce3fc5f (diff) | |
| download | linux-5f274d886598c9fd26d2499bf3f68306f170e9db.tar.gz linux-5f274d886598c9fd26d2499bf3f68306f170e9db.tar.bz2 linux-5f274d886598c9fd26d2499bf3f68306f170e9db.zip | |
dm bio prison: introduce support for locking ranges of blocks
Ranges will be placed in the same cell if they overlap.
Range locking is a prerequisite for more efficient multi-block discard
support in both the cache and thin-provisioning targets.
Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-bio-prison.c')
| -rw-r--r-- | drivers/md/dm-bio-prison.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/md/dm-bio-prison.c b/drivers/md/dm-bio-prison.c index bbe22a5dc06b..be065300e93c 100644 --- a/drivers/md/dm-bio-prison.c +++ b/drivers/md/dm-bio-prison.c @@ -95,10 +95,10 @@ static int cmp_keys(struct dm_cell_key *lhs, if (lhs->dev > rhs->dev) return 1; - if (lhs->block < rhs->block) + if (lhs->block_end <= rhs->block_begin) return -1; - if (lhs->block > rhs->block) + if (lhs->block_begin >= rhs->block_end) return 1; return 0; |