linux-kernel - Re: [PATCH] block: Add nr_bios to block_rq

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Message-ID: <20130921195814.GE2312@kernel.dk>
Date:	Sat, 21 Sep 2013 13:58:14 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Jun'ichi Nomura <j-nomura@...jp.nec.com>
Cc:	device-mapper development <dm-devel@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Frank Mayhar <fmayhar@...gle.com>,
	Mike Snitzer <snitzer@...hat.com>,
	Mikulas Patocka <mpatocka@...hat.com>
Subject: Re: [PATCH] block: Add nr_bios to block_rq_remap tracepoint

On Tue, Sep 17 2013, Jun'ichi Nomura wrote:
> Adding the number of bios in a remapped request to 'block_rq_remap'
> tracepoint.
> 
> Request remapper clones bios in a request to track the completion
> status of each bio. So the number of bios can be useful information
> for investigation.
> 
> Related discussions:
>   http://www.redhat.com/archives/dm-devel/2013-August/msg00084.html
>   http://www.redhat.com/archives/dm-devel/2013-September/msg00024.html
> 
> Signed-off-by: Jun'ichi Nomura <j-nomura@...jp.nec.com>
> Acked-by: Mike Snitzer <snitzer@...hat.com>
> Cc: Jens Axboe <axboe@...nel.dk>

Thanks, added.

-- 
Jens Axboe

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