linux-kernel - Re: [PATCH v3] writeback: safer lock nesting

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Message-Id: <20180410134837.d2b0f2d1cd940bb08c2bad0a@linux-foundation.org>
Date:   Tue, 10 Apr 2018 13:48:37 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Greg Thelen <gthelen@...gle.com>,
        Wang Long <wanglong19@...tuan.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Tejun Heo <tj@...nel.org>, npiggin@...il.com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [PATCH v3] writeback: safer lock nesting

On Tue, 10 Apr 2018 08:33:57 +0200 Michal Hocko <mhocko@...nel.org> wrote:

> > Reported-by: Wang Long <wanglong19@...tuan.com>
> > Signed-off-by: Greg Thelen <gthelen@...gle.com>
> > Change-Id: Ibb773e8045852978f6207074491d262f1b3fb613
> 
> Not a stable material IMHO

Why's that?  Wang Long said he's observed the deadlock three times?