linux-kernel - Re: divide error: bdi_dirty

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Message-ID: <20120924201650.6574af64.conny.seidel@amd.com>
Date:	Mon, 24 Sep 2012 20:16:50 +0200
From:	Conny Seidel <conny.seidel@....com>
To:	Borislav Petkov <bp@...64.org>, Jan Kara <jack@...e.cz>
CC:	<linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <jweiner@...hat.com>
Subject: Re: divide error: bdi_dirty_limit+0x5a/0x9e

Hi,

On Mon, 24 Sep 2012 16:36:09 +0200
Borislav Petkov <bp@...64.org> wrote:
>[ … ]
>
>Conny, would you test pls?

Sure thing.
Out of ~25 runs I only triggered it once, without the patch the
trigger-rate is higher.

[   55.098249] Broke affinity for irq 81
[   55.105108] smpboot: CPU 1 is now offline
[   55.311216] smpboot: Booting Node 0 Processor 1 APIC 0x11
[   55.333022] LVT offset 0 assigned for vector 0x400
[   55.545877] smpboot: CPU 2 is now offline
[   55.753050] smpboot: Booting Node 0 Processor 2 APIC 0x12
[   55.775582] LVT offset 0 assigned for vector 0x400
[   55.986747] smpboot: CPU 3 is now offline
[   56.193839] smpboot: Booting Node 0 Processor 3 APIC 0x13
[   56.212643] LVT offset 0 assigned for vector 0x400
[   56.423201] Got negative events: -25

The Divide error wasn't triggered with the patch applied.


--
Kind regards.

Conny Seidel

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