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

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Date:	Sat, 28 Jun 2014 08:13:14 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Jens Axboe <axboe@...nel.dk>
Cc:	linux-kernel@...r.kernel.org, kmo@...erainc.com,
	nab@...ux-iscsi.org
Subject: Re: [PATCHSET block/for-next] blk-mq: update freezing

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

Thanks.

-- 
tejun
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