From d85c8a6f1bc083279215ff6e79b7c292bf3ec905 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Thu, 15 Dec 2011 15:38:41 -0500 Subject: [PATCH] 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 --- fs/btrfs/volumes.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 91ea57a..f4b839f 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(); -- 2.7.4