linux-kernel - Re: [PATCH v3] x86, vt-d: enable x2apic opt out

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Date:	Tue, 24 May 2011 08:13:28 -0400
From:	Valdis.Kletnieks@...edu
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Youquan Song <youquan.song@...ux.intel.com>,
	"Song, Youquan" <youquan.song@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"hpa@...or.com" <hpa@...or.com>,
	"hpa@...ux.intel.com" <hpa@...ux.intel.com>,
	"Kay, Allen M" <allen.m.kay@...el.com>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	"Sankaran, Rajesh" <rajesh.sankaran@...el.com>,
	"Mallick, Asit K" <asit.k.mallick@...el.com>,
	"Liu, Kent" <kent.liu@...el.com>
Subject: Re: [PATCH v3] x86, vt-d: enable x2apic opt out

On Tue, 24 May 2011 08:38:47 BST, David Woodhouse said:
> On Tue, 2011-05-24 at 05:18 +0100, Valdis.Kletnieks@...edu wrote:
> > Do we want an actual WARN there, complete with stack traceback and
> > all?
> > 
> > Or did you intend a pr_warn or printk(KERN_WARNING or similar?
> 
> The traceback has been very useful in other BIOS issues, because it gets
> tracked and counted on kerneloops.org along with platform
> identification. So we have been able to track down the major offenders
> of some of the most egregious BIOS stupidities and make *some* progress
> on getting them to improve the untested dross they habitually turn out.

Oh OK... that probably is a good idea then.

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