diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2014-02-06 06:08:56 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-06 21:30:13 -0800 |
| commit | 4f48d3328e128896f3d22ca5f8c4825108e55e30 (patch) | |
| tree | 3b20d1f54e958df0eab2de8fbd80803d554630d4 /drivers/md/dm-thin.c | |
| parent | f4124bc34fe3a9f6c5fa3910ca0cc573708eb3b6 (diff) | |
dm thin: avoid metadata commit if a pool's thin devices haven't changed
commit 4d1662a30dde6e545086fe0e8fd7e474c4e0b639 upstream.
Commit 905e51b ("dm thin: commit outstanding data every second")
introduced a periodic commit. This commit occurs regardless of whether
any thin devices have made changes.
Fix the periodic commit to check if any of a pool's thin devices have
changed using dm_pool_changed_this_transaction().
Reported-by: Alexander Larsson <alexl@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/md/dm-thin.c')
| -rw-r--r-- | drivers/md/dm-thin.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-thin.c b/drivers/md/dm-thin.c index 73c76c565a4d..4759f1772c4e 100644 --- a/drivers/md/dm-thin.c +++ b/drivers/md/dm-thin.c @@ -1344,7 +1344,8 @@ static void process_deferred_bios(struct pool *pool) bio_list_init(&pool->deferred_flush_bios); spin_unlock_irqrestore(&pool->lock, flags); - if (bio_list_empty(&bios) && !need_commit_due_to_time(pool)) + if (bio_list_empty(&bios) && + !(dm_pool_changed_this_transaction(pool->pmd) && need_commit_due_to_time(pool))) return; if (commit_or_fallback(pool)) { |