From mboxrd@z Thu Jan  1 00:00:00 1970
From: Avi Kivity <avi@qumranet.com>
Subject: Re: [patch] KVM: T60 resume fix
Date: Sat, 03 Mar 2007 10:22:13 +0200
Message-ID: <45E93035.2070509@qumranet.com>
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To: "Michael S. Tsirkin" <mst@mellanox.co.il>
Cc: Daniel Walker <dwalker@mvista.com>, Michal Piotrowski <michal.k.k.piotrowski@gmail.com>, linux-pm@lists.osdl.org, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Andrew Morton <akpm@linux-foundation.org>, Adrian Bunk <bunk@stusta.de>, Pavel Machek <pavel@ucw.cz>, Jens Axboe <jens.axboe@oracle.com>, Thomas Gleixner <tglx@linutronix.de>, Linus Torvalds <torvalds@linux-foundation.org>, Ingo Molnar <mingo@elte.hu>, git@vger.kernel.org
List-Id: linux-pm@vger.kernel.org

Michael S. Tsirkin wrote:
>> Quoting Ingo Molnar <mingo@elte.hu>:
>> Subject: [patch] KVM: T60 resume fix
>> From: Ingo Molnar <mingo@elte.hu>
>>
>> my T60 laptop does not resume correctly due to KVM attempting to send an =

>> IPI to a CPU that might be down (or not up yet). (Doing so also triggers =

>> the send_IPI_mask_bitmask() warning in arch/i386/kernel/smp.c, line =

>> 732.)
>>
>> with this fix applied my laptop does not hang during resume.
>>
>> [ KVM will have to disable/enable virtualization on the CPU itself that
>>   goes down / comes up, not via an IPI sent from the requesting CPU. ]
>>
>> Signed-off-by: Ingo Molnar <mingo@elte.hu>
>>     =

>
> Since I don't normally have kvm loaded, this patch is unlikely
> to help me, is that right?
>
>   =


That is correct.


-- =

Do not meddle in the internals of kernels, for they are subtle and quick to=
 panic.