linux-kernel - Re: [RFC 3/4] mm, page_alloc: move cpuset seqcount checking to slowpath

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Message-ID: <036f01d2715b$97827e80$c6877b80$@alibaba-inc.com>
Date:   Wed, 18 Jan 2017 15:22:13 +0800
From:   "Hillf Danton" <hillf.zj@...baba-inc.com>
To:     "'Vlastimil Babka'" <vbabka@...e.cz>,
        "'Mel Gorman'" <mgorman@...hsingularity.net>,
        "'Ganapatrao Kulkarni'" <gpkulkarni@...il.com>
Cc:     "'Michal Hocko'" <mhocko@...nel.org>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [RFC 3/4] mm, page_alloc: move cpuset seqcount checking to slowpath

On Wednesday, January 18, 2017 6:16 AM Vlastimil Babka wrote: 
> 
> This is a preparation for the following patch to make review simpler. While
> the primary motivation is a bug fix, this could also save some cycles in the
> fast path.
> 
This also gets kswapd involved. 
Dunno how frequent cpuset is changed in real life.

Hillf