Re: [PATCH v3] writeback: safer lock nesting

[Michal Hocko]

On Tue 10-04-18 13:48:37, Andrew Morton wrote:
> 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?

I thought it is just too unlikely to hit all the conditions. My fault,
I have completely missed/forgot the fact Wang Long is seeing the issue
happening.

No real objection for the stable backport from me.

-- 
Michal Hocko
SUSE Labs