Re: [PATCH] block: Add a trace point whenever a barrier IO requestis sent
From: Jens Axboe
Date: Wed Apr 21 2010 - 17:27:33 EST
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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