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(parent: f099a12) | patch
md/raid1, raid10: add blktrace records when IO is delayed
authorNeilBrown <neilb@suse.com>
Mon, 14 Nov 2016 05:30:21 +0000 (16:30 +1100)
committerShaohua Li <shli@fb.com>
Fri, 18 Nov 2016 17:35:37 +0000 (09:35 -0800)
commitfb8f048680c6c40043a882dfce3484888e6b99f0
tree8a538bd4decbbe556c585455efd9ea5daf33bfa9tree | snapshot
parentf099a1239e8f8dd8f4dd99c3e81c983c15b06d52commit | diff
md/raid1, raid10: add blktrace records when IO is delayed

Both raid1 and raid10 will sometimes delay handling an IO request,
such as when resync is happening or there are too many requests queued.

Add some blktrace messsages so we can see when that is happening when
looking for performance artefacts.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
drivers/md/raid1.c diff | blob | history
drivers/md/raid10.c diff | blob | history
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