md/raid1, raid10: add blktrace records when IO is delayed

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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>

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NeilBrown 2016-11-14 16:30:21 +11:00 • committed by Shaohua Li

parent 581dbd94da

commit 578b54ade8

2 changed files with 16 additions and 0 deletions

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8

drivers/md/raid1.c

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8

drivers/md/raid10.c

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