linux-kernel - Re: PNP PS/2 probing racy?

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Message-Id: <DE24773B-F00A-4866-8E88-AE63E6135743@gmail.com>
Date:	Thu, 28 Jan 2010 07:57:47 -0800
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: PNP PS/2 probing racy?

Hi Andi,

On Jan 28, 2010, at 5:54 AM, Andi Kleen <andi@...stfloor.org> wrote:

>
> Hi,
>
> I noticed that on one test system of machine when booting the same
> kernel I get:
>
> PNP: No PS/2 controller found. Probing ports directly.
> serio: i8042 KBD port at 0x60,0x64 irq 1
> serio: i8042 AUX port at 0x60,0x64 irq 12
>
> and sometimes on another boot
>
> PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
>
> Since I presume the BIOS does not change, is it possible the Linux
> procedure for this PNP probe is racy? I haven't checked the code so  
> far.
>

Are you using KVM with that box by any chance?

-- 
Dmitry

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