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Message-ID: <b1b8c2d47329152c9f2f2dc4eba884e1d7262c4b.camel@gmx.de>
Subject: Re: scheduling while atomic in z3fold
From:   Mike Galbraith <efault@gmx.de>
To:     Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc:     Oleksandr Natalenko <oleksandr@natalenko.name>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Andrew Morton <akpm@linux-foundation.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-rt-users@vger.kernel.org
Date:   Mon, 30 Nov 2020 17:53:56 +0100
In-Reply-To: <2658a2a26e53826687cd7b22f424e2d3319423dd.camel@gmx.de>
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On Mon, 2020-11-30 at 17:27 +0100, Mike Galbraith wrote:
> On Mon, 2020-11-30 at 17:03 +0100, Sebastian Andrzej Siewior wrote:
> > On 2020-11-30 16:01:11 [+0100], Mike Galbraith wrote:
> > > On Mon, 2020-11-30 at 15:52 +0100, Sebastian Andrzej Siewior wrote:
> > > > How do you test this? I triggered a few oom-killer and I have here=
 git
> > > > gc running for a few hours now=E2=80=A6 Everything is fine.
> > >
> > > In an LTP install, ./runltp -f mm.  Shortly after box starts swappin=
g
> > > insanely, it explodes quite reliably here with either z3fold or
> > > zsmalloc.. but not with zbud.
> >
> > This just passed. It however killed my git-gc task which wasn't done.
> > Let me try tomorrow with your config.
>
> FYI, I tried 5.9-rt (after fixing 5.9.11), it exploded in the same way,
> so (as expected) it's not some devel tree oopsie.

It reproduces in full distro KVM too.

	-Mike