From mboxrd@z Thu Jan  1 00:00:00 1970
From: Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH][RT] x86: Fix an RT MCE crash
Date: Thu, 30 Jun 2016 19:01:34 +0200
Message-ID: <20160630170134.GA3932@pd.tnic>
References: <1467293089-27656-1-git-send-email-minyard@acm.org>
 <20160630094301.22d32ec1@gandalf.local.home>
 <5775316F.2020102@acm.org>
 <20160630115101.6337c395@gandalf.local.home>
 <20160630160128.GA4365@pd.tnic>
 <3908561D78D1C84285E8C5FCA982C28F3A14CDB9@ORSMSX114.amr.corp.intel.com>
 <57754B71.2000108@acm.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Cc: "Luck, Tony" <tony.luck@intel.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	"linux-rt-users@vger.kernel.org" <linux-rt-users@vger.kernel.org>,
	Corey Minyard <cminyard@mvista.com>
To: Corey Minyard <minyard@acm.org>
Return-path: <linux-rt-users-owner@vger.kernel.org>
Received: from mail.skyhub.de ([78.46.96.112]:47733 "EHLO mail.skyhub.de"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1751945AbcF3RBi (ORCPT <rfc822;linux-rt-users@vger.kernel.org>);
	Thu, 30 Jun 2016 13:01:38 -0400
Content-Disposition: inline
In-Reply-To: <57754B71.2000108@acm.org>
Sender: linux-rt-users-owner@vger.kernel.org
List-ID: <linux-rt-users.vger.kernel.org>

On Thu, Jun 30, 2016 at 11:40:17AM -0500, Corey Minyard wrote:
> I'm not sure.  I've included the entire boot log below...

...

> [    0.164185]  [<ffffffff8106dcd8>] try_to_wake_up+0x28/0x320
> [    0.164188]  [<ffffffff8106dfe0>] wake_up_process+0x10/0x20
> [    0.164207]  [<ffffffff8101c548>] mce_notify_irq+0x28/0x30
> [    0.164210]  [<ffffffff8101df35>] intel_threshold_interrupt+0xb5/0xd0
> [    0.164213]  [<ffffffff8101e88c>] smp_threshold_interrupt+0x1c/0x40
> [    0.164221]  [<ffffffff816f9b5a>] threshold_interrupt+0x6a/0x70
> [    0.164223]  <EOI>
> [    0.164226]  [<ffffffff8101dda7>] ? cmci_recheck+0x67/0x70
> [    0.164241]  [<ffffffff816e9777>] setup_local_APIC+0x276/0x283
> [    0.164259]  [<ffffffff81caf010>] native_smp_prepare_cpus+0x379/0x43b
> [    0.164266]  [<ffffffff81ca3e4f>] kernel_init_freeable+0xd7/0x21a
> [    0.164270]  [<ffffffff816df1f0>] ? rest_init+0x90/0x90
> [    0.164272]  [<ffffffff816df1f9>] kernel_init+0x9/0x180
> [    0.164275]  [<ffffffff816f8dc8>] ret_from_fork+0x58/0x90
> [    0.164277]  [<ffffffff816df1f0>] ? rest_init+0x90/0x90
> [    0.164295] Code: e7 ff ff 48 8b 7d 08 e8 02 1a 95 ff 5d c3 55 48 89 e5
> 41 54 53 48 89 fb 9c 41 5c fa bf 01 00 00 00 e8 a8 38 00 00 ba 00 01 00 00
> <f0> 66 0f c1 13 0f b6 ce 38 d1 74 10 0f 1f 80 00 00 00 00 f3 90
> [    0.164298] RIP  [<ffffffff816f344d>] _raw_spin_lock_irqsave+0x1d/0x50
> [    0.164298]  RSP <ffff88017fa03f00>
> [    0.164299] CR2: 0000000000000600
> [    0.656225] ---[ end trace 0000000000000001 ]---
> [    0.656233] Kernel panic - not syncing: Fatal exception in interrupt

Hmm, we have that setup_local_APIC -> cmci_recheck path on latest kernel
too. However, we do init CMCI earlier, down the start_kernel() path.

Would it be possible to boot latest upstream kernel on it to see whether
it explodes the same way?

Thanks.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.