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| author | Chris Mason <chris.mason@oracle.com> | 2011-12-15 21:38:41 +0100 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2011-12-15 21:38:41 +0100 |
| commit | d85c8a6f1bc083279215ff6e79b7c292bf3ec905 (patch) | |
| tree | a816e64b9c9fa84ae3033ecf12a21a429a7301d9 | |
| parent | Merge branch 'for-chris' of http://git.kernel.org/pub/scm/linux/kernel/git/jo... (diff) | |
| download | linux-d85c8a6f1bc083279215ff6e79b7c292bf3ec905.tar.xz linux-d85c8a6f1bc083279215ff6e79b7c292bf3ec905.zip | |
Btrfs: unplug every once and a while
The btrfs io submission threads can build up massive plug lists. This
keeps things more reasonable so we don't hand over huge dumps of IO at
once.
Signed-off-by: Chris Mason <chris.mason@oracle.com>
| -rw-r--r-- | fs/btrfs/volumes.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 91ea57a1474a..f4b839fd3c9d 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -295,6 +295,12 @@ loop_lock: btrfs_requeue_work(&device->work); goto done; } + /* unplug every 64 requests just for good measure */ + if (batch_run % 64 == 0) { + blk_finish_plug(&plug); + blk_start_plug(&plug); + sync_pending = 0; + } } cond_resched(); |