Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
In-Reply-To: <cbb38230-9c57-905b-3a11-e2717c5aa615@intel.com>
References: <CAMe9rOqXsQ4Onv8_-kYE_yVYVfN0Hsg81XM0sq9k2cVYE_LvaQ@mail.gmail.com>
 <50d6bb50-5fa4-33d1-1f88-3844d0237f16@intel.com> <CAMe9rOoA=OoyaUfOvWuHGTp_ii9-A_ecR5tj8CefBKx_Hmi50g@mail.gmail.com>
 <7db385ef-0940-8f28-87b0-828921dd2f1d@intel.com> <CAMe9rOoZ=8ROyR6U3-JY+4hib2Bb5LGhBYzY5S_Xp38coj16aQ@mail.gmail.com>
 <9548e10a-7403-425e-bf1f-b1eb9d055d99@intel.com> <CAMe9rOrHowBX06nihdRRmEqhV8v7cs+PwVY7JYQFpUFOnHC71A@mail.gmail.com>
 <f22ee1e2-9a35-697f-50ab-543ac1631c89@intel.com> <CAMe9rOpPwtPd-R+D9=iDYgbFtnP+=akWic-QBKwq9wKa7uadEQ@mail.gmail.com>
 <2022d212-62f2-a163-2493-abecfbafa07b@intel.com> <CAMe9rOqc0oVw+ZLXCM-nrtPb1OiPFBeHt+Lsx+6K6y=t3HSVhA@mail.gmail.com>
 <cbb38230-9c57-905b-3a11-e2717c5aa615@intel.com>
From:   "H.J. Lu" <hjl.tools@gmail.com>
Date:   Wed, 11 Jul 2018 09:53:41 -0700
Message-ID: <CAMe9rOqh9saaULM_+jNtzfYarbZScm+6KCEyibxxqn7GLvKwzA@mail.gmail.com>
Subject: Re: Kernel 4.17.4 lockup
To:     Dave Hansen <dave.hansen@intel.com>
Cc:     "H. Peter Anvin" <hpa@zytor.com>,
        LKML <linux-kernel@vger.kernel.org>,
        Andy Lutomirski <luto@kernel.org>,
        Mel Gorman <mgorman@suse.de>,
        Andrew Morton <akpm@linux-foundation.org>,
        Rik van Riel <riel@surriel.com>,
        Minchan Kim <minchan@kernel.org>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Wed, Jul 11, 2018 at 9:49 AM, Dave Hansen <dave.hansen@intel.com> wrote:
> On 07/11/2018 09:29 AM, H.J. Lu wrote:
>>>> # It takes about 3 hour to bootstrap x86-64 GCC and 3 hour to run tests,
>>>> TIMEOUT=480
>>>> # Run it every hour,
>>>> 30 * * * * /export/gnu/import/git/gcc-test-x32/gcc-build -mx32
>>>> --with-pic > /dev/null 2>&1
>>> Oh, fun, one of those.
>>>
>>> How long does it take to reproduce?
>> About 5 hours.
>
> It would be much appreciated if you can get a console of some kind on
> that system and try to get a full KASAN oops out of it.  Serial, usb
> debug, or maybe netconsole would probably work.

I don't have serial ports. I will try netconsole.

> I'll also try to get it running on a big system and see if it triggers
> faster there.

I have seen it on machines with various amounts of cores and RAMs.
It triggers the fastest on 8 cores with 6GB RAM reliably.

-- 
H.J.