From: Avi Kivity <avi@argo.co.il>
To: Bill Davidsen <davidsen@tmr.com>
Cc: Ingo Molnar <mingo@elte.hu>, Andi Kleen <ak@suse.de>,
linux-kernel@vger.kernel.org
Subject: Re: [patch] disable NMI watchdog by default
Date: Thu, 08 Mar 2007 21:44:38 +0200 [thread overview]
Message-ID: <45F067A6.8090707@argo.co.il> (raw)
In-Reply-To: <45EC3F25.5060308@tmr.com>
Bill Davidsen wrote:
>>
>> there's a new NMI watchdog related problem: KVM crashes on certain
>> bzImages because ... we enable the NMI watchdog by default (even if
>> the user does not ask for it) , and no other OS on this planet does
>> that so KVM doesnt have emulation for that yet. So KVM injects a #GP,
>> which crashes the Linux guest:
>>
> I'm missing something, what limits this to systems running under kvm?
>
Most likely kvm doesn't implement the msrs which drive the nmi
watchdog. That makes it a kvm bug, not a problem with the nmi
watchdog. Emulating it correctly is fairly difficult, though,
especially if we want to migrate virtual machines between different
processor models, so I hope this goes in.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
next prev parent reply other threads:[~2007-03-08 19:54 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-14 9:29 [patch] disable NMI watchdog by default Ingo Molnar
2007-01-14 14:45 ` Henrique de Moraes Holschuh
2007-01-14 16:45 ` Arjan van de Ven
2007-03-05 16:02 ` Bill Davidsen
2007-03-08 19:44 ` Avi Kivity [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-03-05 12:20 Ingo Molnar
2007-03-05 14:49 ` Arjan van de Ven
2007-03-05 17:42 ` Len Brown
2007-03-05 19:54 ` Andi Kleen
2007-03-05 20:26 ` Ingo Molnar
2007-03-05 20:40 ` Linus Torvalds
2007-03-07 3:06 ` Roland Dreier
2007-03-07 14:56 ` Andi Kleen
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