linux-kernel - Re: PANIC: "Oops: 0000 [#1] PREEMPT SMP PTI" starting from 5.17 on dual socket Intel Xeon Gold servers

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Message-ID: <Yjl26QqwU1L2XWoh@kroah.com>
Date:   Tue, 22 Mar 2022 08:12:41 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Jirka Hladky <jhladky@...hat.com>
Cc:     stable@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        regressions@...ts.linux.dev
Subject: Re: PANIC: "Oops: 0000 [#1] PREEMPT SMP PTI" starting from 5.17 on
 dual socket Intel Xeon Gold servers

On Tue, Mar 22, 2022 at 12:37:37AM +0100, Jirka Hladky wrote:
> Cc: regressions@...ts.linux.dev stable@...r.kernel.org
> 
> On Tue, Mar 22, 2022 at 12:29 AM Jirka Hladky <jhladky@...hat.com> wrote:
> >
> > Starting from kernel 5.17 (tested with rc2, rc4, rc7, rc8) we
> > experience kernel oops on Intel Xeon Gold dual-socket servers (2x Xeon
> > Gold 6126 CPU)
> >
> > Bellow is a backtrace and the dmesg log.
> >
> > I have trouble creating a simple reproducer - it happens at random
> > places when preparing the NAS benchmark to be run. The script creates
> > a bunch of directories, compiles the benchmark a start trial runs.
> >
> > Could you please help to narrow down the problem?

Can you use 'git bisect' to track down the kernel commit that caused
this problem?

thanks,

greg k-h