Messages in this thread | | | Date | Wed, 21 Apr 2010 23:27:27 +0200 | From | Jens Axboe <> | Subject | Re: [PATCH] block: Add a trace point whenever a barrier IO request is sent |
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On Wed, Apr 21 2010, Darrick J. Wong wrote: > Simple debugging patch used to watch for barrier requests. I've been using > this to watch ext4's barrier=1 behavior.
But barriers are already being logged, if you watch blkparse data, it'll be RB or WB events. So I don't see what this addition provides that we don't already have?
-- Jens Axboe
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