linux-kernel - Re: [PATCH 1/2] mm,vmscan: Kill global shrinker lock.

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Message-ID: <20171120104129.GA25042@infradead.org>
Date:   Mon, 20 Nov 2017 02:41:29 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Minchan Kim <minchan@...nel.org>,
        Huang Ying <ying.huang@...el.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Shakeel Butt <shakeelb@...gle.com>,
        Greg Thelen <gthelen@...gle.com>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH 1/2] mm,vmscan: Kill global shrinker lock.

On Mon, Nov 20, 2017 at 10:42:37AM +0100, Michal Hocko wrote:
> The patch has been dropped because allnoconfig failed to compile back
> then http://lkml.kernel.org/r/CAP=VYLr0rPWi1aeuk4w1On9CYRNmnEWwJgGtaX=wEvGaBURtrg@mail.gmail.com
> I have problem to find the follow up discussion though. The main
> argument was that SRC is not generally available and so the core
> kernel should rely on it.

Paul,

isthere any good reason to not use SRCU in the core kernel and
instead try to reimplement it using atomic counters?