From: Patrick Schaaf <bof@bof.de>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: Patrick Schaaf <bof@bof.de>,
stable@vger.kernel.org, regressions@lists.linux.dev
Subject: Re: stable 5.4.135 REGRESSION / once-a-day WARNING: at kthread_is_per_cpu+0x1c/0x20
Date: Wed, 28 Jul 2021 19:51:59 +0200 [thread overview]
Message-ID: <CAJ26g5Rtu+LwCctckwWUHTSidpav5_RHgx9o5T_ZLbBzsLLOKQ@mail.gmail.com> (raw)
In-Reply-To: <YQGXyiMb1IntqacG@kroah.com>
On Wed, Jul 28, 2021 at 7:45 PM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> > to roll out 5.4.135 on a few of the hosts, and encounter a rare "WARNING: CPU ... PID ... at kthread_is_per_cpu+0x1c/0x20" splat (see full dmesg below)
> >
> > Previous kernel I was running there, never seeing that, was 5.4.114
>
> Can you narrow this down to a specific commit using 'git bisect'?
Not set up for it, but can try - I normally build from .tar.xz's.
Given the WARNING seems to take a day to happen, it'll take a while to
bisect that by commits.
I'll try to revert that one 5.4.118 change in kernel/sched/fair.c, in parallel.
best regards
Patrick
next prev parent reply other threads:[~2021-07-28 17:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 17:02 stable 5.4.135 REGRESSION / once-a-day WARNING: at kthread_is_per_cpu+0x1c/0x20 bof
2021-07-28 17:45 ` Greg KH
2021-07-28 17:51 ` Patrick Schaaf [this message]
2021-08-31 4:46 ` Patrick Schaaf
2021-08-31 7:00 ` Peter Zijlstra
2021-08-31 14:57 ` Patrick Schaaf
2021-07-28 17:40 bof
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