linux-kernel - Re: [PATCH 0/5 V5] Avoid soft lockup message when KVM is stopped by host

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Date:	Thu, 22 Dec 2011 11:59:54 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Marcelo Tosatti <mtosatti@...hat.com>
CC:	Eric B Munson <emunson@...bm.net>, mingo@...hat.com, hpa@...or.com,
	arnd@...db.de, ryanh@...ux.vnet.ibm.com, aliguori@...ibm.com,
	jeremy.fitzhardinge@...rix.com, levinsasha928@...il.com,
	Jan Kiszka <jan.kiszka@...mens.com>, kvm@...r.kernel.org,
	linux-arch@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/5 V5] Avoid soft lockup message when KVM is stopped
 by host

On 12/19/2011 07:50 PM, Marcelo Tosatti wrote:
> > 
> > Maybe it is good (not sure), need to look into schedstats and think of
> > cases that would break legitimate guest hangs. And it probably also
> > affects the position of clearing the flag on the guest side as its 
> > currently done in Eric's patchset.
>
> Is the task going to be TASK_UNINTERRUPTIBLE with SIGSTOP? Don't think
> so. 

No.

> Note "Preemption while TASK_RUNNING or TASK_UNINTERRUPTIBLE" is not
> functional for guest-paused-via-QEMU-monitor case.

Right, it's a different case.  Note SIGCONT can be trapped, so it's
similar to monitor cont.

-- 
error compiling committee.c: too many arguments to function

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