Re: [PATCH v3] writeback: safer lock nesting

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To: Michal Hocko <mhocko@xxxxxxxxxx>
Subject: Re: [PATCH v3] writeback: safer lock nesting
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Date: Tue, 10 Apr 2018 13:48:37 -0700
Cc: Greg Thelen <gthelen@xxxxxxxxxx>, Wang Long <wanglong19@xxxxxxxxxxx>, Johannes Weiner <hannes@xxxxxxxxxxx>, Tejun Heo <tj@xxxxxxxxxx>, npiggin@xxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
In-reply-to: <20180410063357.GS21835@dhcp22.suse.cz>
References: <201804080259.VS5U0mKT%fengguang.wu@intel.com> <20180410005908.167976-1-gthelen@google.com> <20180410063357.GS21835@dhcp22.suse.cz>

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

> > Reported-by: Wang Long <wanglong19@xxxxxxxxxxx>
> > Signed-off-by: Greg Thelen <gthelen@xxxxxxxxxx>
> > Change-Id: Ibb773e8045852978f6207074491d262f1b3fb613
> 
> Not a stable material IMHO

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

Follow-Ups:
- Re: [PATCH v3] writeback: safer lock nesting
  - From: Michal Hocko

References:
- Re: [PATCH v2] writeback: safer lock nesting
  - From: kbuild test robot
- [PATCH v3] writeback: safer lock nesting
  - From: Greg Thelen
- Re: [PATCH v3] writeback: safer lock nesting
  - From: Michal Hocko

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