]> git.baikalelectronics.ru Git - kernel.git/commit
dm thin: commit outstanding data every second
authorJoe Thornber <ejt@redhat.com>
Wed, 28 Mar 2012 17:41:27 +0000 (18:41 +0100)
committerAlasdair G Kergon <agk@redhat.com>
Wed, 28 Mar 2012 17:41:27 +0000 (18:41 +0100)
commit136b4e150b625f10d13c0132748470fe3523ceca
treed8e1d9fcdba66942333f099618e6acc5be238538
parentdc93fd06463923f7705860aa5088ba152964264a
dm thin: commit outstanding data every second

Commit unwritten data every second to prevent too much building up.

Released blocks don't become available until after the next commit
(for crash resilience).  Prior to this patch commits were only
triggered by a message to the target or a REQ_{FLUSH,FUA} bio.  This
allowed far too big a position to build up.

The interval is hard-coded to 1 second.  This is a sensible setting.
I'm not making this user configurable, since there isn't much to be
gained by tweaking this - and a lot lost by setting it far too high.

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>
drivers/md/dm-thin.c