From: Peter Zijlstra <peterz@infradead.org>
To: Mel Gorman <mgorman@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Miao Xie <miaox@cn.fujitsu.com>,
David Rientjes <rientjes@google.com>,
Christoph Lameter <cl@linux.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] cpuset: mm: Reduce large amounts of memory barrier related damage v3
Date: Mon, 26 Mar 2012 13:07:27 +0200 [thread overview]
Message-ID: <1332760047.16159.93.camel@twins> (raw)
In-Reply-To: <1332759384.16159.92.camel@twins>
On Mon, 2012-03-26 at 12:56 +0200, Peter Zijlstra wrote:
> static inline bool put_mems_allowed(unsigned int seq)
> {
> - return !read_seqcount_retry(¤t->mems_allowed_seq, seq);
> + return likely(!read_seqcount_retry(¤t->mems_allowed_seq, seq));
> }
Ignore this hunk, read_seqcount_retry() already has a branch hint in.
I'll send a new version if people thing the rest of the patch is worth
it.
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next prev parent reply other threads:[~2012-03-26 11:08 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-07 18:08 [PATCH] cpuset: mm: Reduce large amounts of memory barrier related damage v3 Mel Gorman
2012-03-26 10:56 ` Peter Zijlstra
2012-03-26 11:07 ` Peter Zijlstra [this message]
2012-03-26 15:50 ` Mel Gorman
2012-03-26 16:20 ` Peter Zijlstra
2012-03-27 12:47 ` Mel Gorman
2012-03-27 13:14 ` [PATCH] mm: Optimize put_mems_allowed() usage Peter Zijlstra
2012-05-17 10:33 ` Peter Zijlstra
2012-05-17 20:16 ` Andrew Morton
2012-05-17 20:23 ` Peter Zijlstra
2013-08-23 13:03 ` [PATCH] cpuset: mm: Reduce large amounts of memory barrier related damage v3 Peter Zijlstra
2013-08-23 18:15 ` Peter Zijlstra
2013-08-26 5:32 ` Rik van Riel
2013-08-29 9:28 ` Mel Gorman
2013-08-29 9:43 ` Peter Zijlstra
2013-08-29 9:45 ` Peter Zijlstra
2013-08-29 10:56 ` Mel Gorman
2013-08-29 11:14 ` Peter Zijlstra
2013-08-29 12:10 ` Mel Gorman
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