From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: "He, Qing" <qing.he-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: kvm-devel <kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Subject: Re: [PATCH] lapic3: kvm: qemu: fix a possible deadlock situation in save/restore
Date: Tue, 07 Aug 2007 11:31:06 +0300 [thread overview]
Message-ID: <46B82DCA.8000601@qumranet.com> (raw)
In-Reply-To: <37E52D09333DE2469A03574C88DBF40FA9C1A4-wq7ZOvIWXbM/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
He, Qing wrote:
> kvm: qemu: fix a possible deadlock situation in save/restore
>
> If a VM using userspace irqchip is saved when it's in HLT state,
> and is restored to use the in-kernel irqchip, the HLT state flag
> is also restored. This HLT flag in userspace HLT handling prevents
> kvm kernel driver from being run. And at the same time, the original
> userspace irqchip is now unused thus will not generate any interrupt
> to wake up the HLT state. This patch fixes this deadlock situation
> by dropping the HLT state at restore time
>
>
Applied, thanks.
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prev parent reply other threads:[~2007-08-07 8:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-07 5:58 [PATCH] lapic3: kvm: qemu: fix a possible deadlock situation in save/restore He, Qing
[not found] ` <37E52D09333DE2469A03574C88DBF40FA9C1A4-wq7ZOvIWXbM/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2007-08-07 8:31 ` Avi Kivity [this message]
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