linux-kernel - Re: [PATCH] fix jiffy calculations in calibrate_delay

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Message-ID: <4D52641E.9020001@suse.cz>
Date:	Wed, 09 Feb 2011 10:53:34 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	Jan Beulich <JBeulich@...ell.com>
CC:	Tim Deegan <Tim.Deegan@...rix.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	akpm@...ux-foundation.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fix jiffy calculations in calibrate_delay_direct	 to
 handle overflow

On 02/09/2011 10:44 AM, Jan Beulich wrote:
>>>> On 09.02.11 at 10:21, Jiri Slaby <jslaby@...e.cz> wrote:
>> On 02/09/2011 09:31 AM, Jan Beulich wrote:
>>> Fixes a hang when booting as dom0 under Xen, when jiffies can be
>>> quite large by the time the kernel init gets this far.
>>
>> As I wrote this might happen if the boot till this point takes ~ 5
>> minutes because we start at -5 minutes.
>>
>> That said, is this a candidate for stable? (If so, please CC stable.)
> 
> Honestly, I'm not certain (given that mainline Xen Dom0 support
> is still only in its beginnings).

What about other VMs? If I run few non-kvm qemu VMs (kvm presets lpj) on
a busy dual-core machine, this will be a problem too, right?

regards,
-- 
js
suse labs
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