linux-kernel - Re: [PATCH][v3.1] blkio: Add io controller stats like

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Message-ID: <20100408124629.GN10103@kernel.dk>
Date:	Thu, 8 Apr 2010 14:46:30 +0200
From:	Jens Axboe <jens.axboe@...cle.com>
To:	Gui Jianfeng <guijianfeng@...fujitsu.com>
Cc:	Divyesh Shah <dpshah@...gle.com>, vgoyal@...hat.com,
	linux-kernel@...r.kernel.org, nauman@...gle.com,
	ctalbott@...gle.com
Subject: Re: [PATCH][v3.1] blkio: Add io controller stats like

On Thu, Apr 08 2010, Gui Jianfeng wrote:
> Divyesh Shah wrote:
> > - io_service_time (the total time between request dispatch and completion for
> >   all IOs in the cgroup)
> > - io_wait_time (the total time spent waiting by all IOs in this cgroup in the IO
> >   scheduler queues before getting serviced)
> > - io_serviced (number of IOs serviced from this blkio_group)
> > - io_service_bytes (Number of bytes served for this cgroup)
> > 
> > These stats are accumulated per operation type helping us to distinguish between
> > read and write, and sync and async IO. This patch does not increment any of
> > these stats.
> > 
> > Changelog from v3:
> > o renamed blkiocg_reset_write to blkiocg_reset_stats
> > o more clarification in the documentation on io_service_time and io_wait_time.
> > 
> > Signed-off-by: Divyesh Shah<dpshah@...gle.com>
> 
> Hi Divyesh,
> 
> Jens has already applied previous patchset to for-2.6.35 branch, so v3 patchset
> and this patch have conflicts with for-2.6.35 branch. I think it's better to make
> new patch on top of for-2.6.35.

Thanks, was just about to ask. Please make an updated patch against what
I already have, so I don't have to revert/rebase to make this work.

-- 
Jens Axboe

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