Date: Mon, 6 Feb 2012 16:39:48 -0800
From: Tejun Heo <tj@kernel.org>
To: Shaohua Li <shaohua.li@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
        Vivek Goyal <vgoyal@redhat.com>, Jens Axboe <axboe@kernel.dk>,
        lkml <linux-kernel@vger.kernel.org>,
        Knut Petersen <Knut_Petersen@t-online.de>, mroos@linux.ee
Subject: Re: [patch]block: fix ioc locking warning
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Hello,

On Tue, Feb 07, 2012 at 08:31:22AM +0800, Shaohua Li wrote:
> Since you are talking about performance, one of our microbenchmark (swap)
> shows a regression. Alex bisect it to be b2efa05265d62bc2, which is related to
> the ioc change. A little strange to me, don't expect such change can cause
> performance issue. I haven't double check the issue, but if you have
> ideas, please let me know.

Hmmm... I think the only thing which can be made slower by that patch
is ioc release (ie. task exits).  What does the microbench do?

Thanks.

-- 
tejun
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