Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
References: <CAE4VaGDZr_4wzRn2___eDYRtmdPaGGJdzu_LCSkJYuY9BEO3cw@mail.gmail.com>
 <CAE4VaGDKXnQJKdayeNsAD5RcqsKu5XG2UeweLvgZoFO-pn-t9Q@mail.gmail.com> <Yjl26QqwU1L2XWoh@kroah.com>
In-Reply-To: <Yjl26QqwU1L2XWoh@kroah.com>
From:   Jirka Hladky <jhladky@redhat.com>
Date:   Tue, 22 Mar 2022 11:19:46 +0100
Message-ID: <CAE4VaGBRcwPEO3JZtSesvE0bFTQ_P62mC7MmZ5Rc9VQey+=L_w@mail.gmail.com>
Subject: Re: PANIC: "Oops: 0000 [#1] PREEMPT SMP PTI" starting from 5.17 on
 dual socket Intel Xeon Gold servers
To:     Greg KH <gregkh@linuxfoundation.org>
Cc:     stable@vger.kernel.org,
        linux-kernel <linux-kernel@vger.kernel.org>,
        regressions@lists.linux.dev
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

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

Yes, I will try that and report the back the findings.

On Tue, Mar 22, 2022 at 8:15 AM Greg KH <gregkh@linuxfoundation.org> wrote:
>
> On Tue, Mar 22, 2022 at 12:37:37AM +0100, Jirka Hladky wrote:
> > Cc: regressions@lists.linux.dev stable@vger.kernel.org
> >
> > On Tue, Mar 22, 2022 at 12:29 AM Jirka Hladky <jhladky@redhat.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
>


-- 
-Jirka