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Date:   Wed, 1 Nov 2017 17:31:16 +0900
From:   Byungchul Park <byungchul.park@....com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Michal Hocko <mhocko@...nel.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        syzbot 
        <bot+e7353c7141ff7cbb718e4c888a14fa92de41ebaa@...kaller.appspotmail.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Johannes Weiner <hannes@...xchg.org>, Jan Kara <jack@...e.cz>,
        jglisse@...hat.com, LKML <linux-kernel@...r.kernel.org>,
        linux-mm@...ck.org, shli@...com, syzkaller-bugs@...glegroups.com,
        Thomas Gleixner <tglx@...utronix.de>,
        Vlastimil Babka <vbabka@...e.cz>, ying.huang@...el.com,
        kernel-team@....com
Subject: Re: possible deadlock in lru_add_drain_all

On Tue, Oct 31, 2017 at 04:25:32PM +0100, Peter Zijlstra wrote:
> But this report only includes a single (cpu-up) part and therefore is

Thanks for fixing me, Peter. I thought '#1 -> #2' and '#2 -> #3', where
#2 is 'cpuhp_state', should have been built with two different classes
of #2 as the latest code. Sorry for confusing Michal.

> not affected by that change other than a lock name changing.

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