linux-kernel - Re: ppc: hard lockup / hang in v5.17-rc1 under QEMU

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Message-ID: <CANiq72n3ReEAf6BNXL99Q9Ovg5kqpXDRSSDaWLd+mJKK7FxdCw@mail.gmail.com>
Date:   Thu, 27 Jan 2022 15:44:20 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Michael Ellerman <mpe@...erman.id.au>
Cc:     linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: ppc: hard lockup / hang in v5.17-rc1 under QEMU

Hi Michael,

On Thu, Jan 27, 2022 at 11:54 AM Michael Ellerman <mpe@...erman.id.au> wrote:
>
> It looks like your kernel-ppc64le-release.config does not have the
> hardlockup detector enabled, so I suspect you're hitting the bug
> described in that patch.

On -release it was a hang; but please note that on -debug the hard
lockup was actually being detected (so it was also reproducible with
the detectors enabled).

> That fix will hit linux-next in the next day or so and should be in rc2.

I confirm the fix works for us -- thanks a lot!

Cheers,
Miguel