linux-kernel - Re: [PATCHSET block/for-next] blk-mq: update freezing

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Date:	Sat, 28 Jun 2014 08:29:26 -0600
From:	Jens Axboe <axboe@...nel.dk>
To:	Tejun Heo <tj@...nel.org>
CC:	linux-kernel@...r.kernel.org, kmo@...erainc.com,
	nab@...ux-iscsi.org
Subject: Re: [PATCHSET block/for-next] blk-mq: update freezing

On 2014-06-28 06:13, Tejun Heo wrote:
> On Wed, Jun 18, 2014 at 09:19:26AM -0700, Jens Axboe wrote:
>>>   percpu/for-3.17 6fbc07bbe2b5 ("percpu: invoke __verify_pcpu_ptr() from the generic part of accessors and operations")
>>> +[1] [PATCHSET percpu/for-3.17] percpu: implement percpu_ref_reinit()
>>>
>>> and available in the following git branch.
>>>
>>>   git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git review-mq-percpu_ref
>>>
>>>   block/blk-core.c       |   13 ++++---
>>>   block/blk-mq.c         |   90 ++++++++++++++++---------------------------------
>>>   block/blk-mq.h         |    2 -
>>>   block/blk-sysfs.c      |    2 -
>>>   include/linux/blkdev.h |    4 +-
>>>   5 files changed, 44 insertions(+), 67 deletions(-)
>>
>> Thanks Tejun, this looks pretty good. I was worried the tryget_live() would
>> be too expensive, but that looks not to be the case. I like the cleanups to
>> using a general mechanism. I'll run this through some functional and
>> performance testing.
>
> FYI, the percpu_ref changes needed by this patchset are applied to
> percpu/for-3.17 branch which is stable and can be pulled into the
> block tree.
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu.git for-3.17

Great, thanks! Was just mulling over this yesterday. I'll get it pulled 
in as a base.

-- 
Jens Axboe

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