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Date: Fri, 9 Nov 2012 15:17:39 -0500 From: Sasha Levin <levinsasha928@...il.com> To: Hu Tao <hutao@...fujitsu.com> Cc: Wen Congyang <wency@...fujitsu.com>, Marcelo Tosatti <mtosatti@...hat.com>, kvm list <kvm@...r.kernel.org>, qemu-devel <qemu-devel@...gnu.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Avi Kivity <avi@...hat.com>, "Daniel P. Berrange" <berrange@...hat.com>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>, Jan Kiszka <jan.kiszka@...mens.com>, Gleb Natapov <gleb@...hat.com>, Blue Swirl <blauwirbel@...il.com>, Eric Blake <eblake@...hat.com>, Andrew Jones <drjones@...hat.com>, Luiz Capitulino <lcapitulino@...hat.com> Subject: Re: [PATCH v11] kvm: notify host when the guest is panicked On Mon, Nov 5, 2012 at 8:58 PM, Hu Tao <hutao@...fujitsu.com> wrote: > But in the case of panic notification, more dependency means more > chances of failure of panic notification. Say, if we use a virtio device > to do panic notification, then we will fail if: virtio itself has > problems, virtio for some reason can't be deployed(neither built-in or > as a module), or guest doesn't support virtio, etc. Add polling to your virtio device. If it didn't notify of a panic but taking more than 20 sec to answer your poll request you can assume it's dead. Actually, just use virtio-serial and something in userspace on the guest. > We choose IO because compared to virtio device, it is not that heavy and > less problematic. Less problematic? Heavy? Are there any known issues with virtio that should be fixed? You make virtio sound like an old IDE drive or something. Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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