linux-kernel - Re: [6.5-rc5 regression] core dump hangs (was Re: [Bug report] fstests generic/051 (on xfs) hang on latest linux v6.5-rc5+)

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Message-ID: <CAHk-=wj0NuJaRNC4o6FVAJgKAFJ5HWcBV5VJw6RGV0ZahqOOZA@mail.gmail.com>
Date:   Sun, 11 Jun 2023 23:11:28 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Dave Chinner <david@...morbit.com>
Cc:     "Darrick J. Wong" <djwong@...nel.org>,
        Zorro Lang <zlang@...hat.com>, linux-xfs@...r.kernel.org,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Mike Christie <michael.christie@...cle.com>,
        "Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [6.5-rc5 regression] core dump hangs (was Re: [Bug report]
 fstests generic/051 (on xfs) hang on latest linux v6.5-rc5+)

On Sun, Jun 11, 2023 at 10:49 PM Dave Chinner <david@...morbit.com> wrote:
>
> On Sun, Jun 11, 2023 at 10:34:29PM -0700, Linus Torvalds wrote:
> >
> > So that "!=" should obviously have been a "==".
>
> Same as without the condition - all the fsstress tasks hang in
> do_coredump().

Ok, that at least makes sense. Your "it made things worse" made me go
"What?" until I noticed the stupid backwards test.

I'm not seeing anything else that looks odd in that commit
f9010dbdce91 ("fork, vhost: Use CLONE_THREAD to fix freezer/ps
regression").

Let's see if somebody else goes "Ahh" when they wake up tomorrow...

              Linus