linux-kernel - Re: Crashes/hung tasks with z3pool under memory pressure

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Message-ID: <20180427171835.GB628@roeck-us.net>
Date:   Fri, 27 Apr 2018 10:18:35 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Vitaly Wool <vitalywool@...il.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        mawilcox@...rosoft.com, asavery@...omium.org,
        Gwendal Grignou <gwendal@...omium.org>
Subject: Re: Crashes/hung tasks with z3pool under memory pressure

Hi Vitaly,

On Thu, Apr 19, 2018 at 08:18:51AM +0000, Vitaly Wool wrote:
> Hi Guenter,
> 
> Den ons 18 apr. 2018 kl 18:07 skrev Guenter Roeck <linux@...ck-us.net>:
> 
> > On Wed, Apr 18, 2018 at 10:13:17AM +0200, Vitaly Wool wrote:
> > > Den tis 17 apr. 2018 kl 18:35 skrev Guenter Roeck <linux@...ck-us.net>:
> > >
> > > <snip>
> > >
> > > > Getting better; the log is much less noisy. Unfortunately, there are
> > still
> > > > locking problems, resulting in a hung task. I copied the log message
> > to [1].
> > > > This is with [2] applied on top of v4.17-rc1.
> > >
> > > Now this version (this is a full patch to be applied instead of the
> > previous one) should have the above problem resolved too:
> > >
> >
> > Excellent - I can not reproduce the problem with this patch
> > applied.
> >
> > thank you very much for testing and prompt feedback. I'll come up shortly
> with the final patch.
> 

Any updates ?

Thanks,
Guenter