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

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Message-ID: <4EEF3538.9060808@redhat.com>
Date:	Mon, 19 Dec 2011 14:59:36 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Amit Shah <amit.shah@...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,
	mtosatti@...hat.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 02:52 PM, Amit Shah wrote:
> On (Thu) 15 Dec 2011 [13:55:15], Avi Kivity wrote:
> > On 12/08/2011 01:34 PM, Amit Shah wrote:
> > > On (Mon) 05 Dec 2011 [15:18:59], Eric B Munson wrote:
> > > > When a guest kernel is stopped by the host hypervisor it can look like a soft
> > > > lockup to the guest kernel.  This false warning can mask later soft lockup
> > > > warnings which may be real.  This patch series adds a method for a host
> > > > hypervisor to communicate to a guest kernel that it is being stopped.  The
> > > > final patch in the series has the watchdog check this flag when it goes to
> > > > issue a soft lockup warning and skip the warning if the guest knows it was
> > > > stopped.
> > >
> > > Guest S4 would need similar treatment, and I think the code in the two
> > > approaches can be shared.  Just something to consider.
> > >
> > 
> > Why does S4 need any treatment?  The guest is aware that it's sleeping,
> > unlike the other cases treated here.
>
> Er, right.
>
> S4 needs some treatment, though, as resume after s4 doesn't work with
> kvmclock enabled.  I didn't realise this series was only handling the
> soft lockup case.
>

What's the issue there?

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

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