netdev - Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413

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Message-ID: <20111207143223.GX15738@erda.amd.com>
Date:	Wed, 7 Dec 2011 15:32:23 +0100
From:	Robert Richter <robert.richter@....com>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
CC:	Jerome Glisse <j.glisse@...il.com>,
	Christoph Lameter <cl@...ux.com>,
	"Alex, Shi" <alex.shi@...el.com>, Dave Airlie <airlied@...hat.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	<dri-devel@...ts.freedesktop.org>,
	Pekka Enberg <penberg@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Matt Mackall <mpm@...enic.com>, <tj@...nel.org>,
	Alex Deucher <alexander.deucher@....com>
Subject: Re: WARNING: at mm/slub.c:3357, kernel BUG at mm/slub.c:3413

On 02.12.11 21:48:20, Markus Trippelsdorf wrote:
> BTW I always see (mostly only on screen, sometimes in the logs):
> 
> [Firmware Bug]: cpu 2, try to use APIC500 (LVT offset 0) for vector 0x10400, but the register is already in use for vector 0xf9 on another cpu
> [Firmware Bug]: cpu 2, IBS interrupt offset 0 not available (MSRC001103A=0x0000000000000100)
> [Firmware Bug]: using offset 1 for IBS interrupts
> [Firmware Bug]: workaround enabled for IBS LVT offset
> perf: AMD IBS detected (0x0000001f) 
> 
> But I hope that it is only a harmless warning. 
> (perf Instruction-Based Sampling)

Yes, the message always apears on AMD family 10h. Nothing to worry
about.

A patch is on the way to soften the message to not scare the people:

 http://git.kernel.org/?p=linux/kernel/git/tip/tip.git;a=commit;h=16e5294e5f8303756a179cf218e37dfb9ed34417

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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