linux-kernel - Re: [patch 134/149] x86, paravirt: Add a global synchronization point for pvclock

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Date:	Thu, 8 Jul 2010 10:51:14 +0200
From:	Peter Palfrader <peter@...frader.org>
To:	Gleb Natapov <gleb@...hat.com>
Cc:	Glauber Costa <glommer@...hat.com>, Greg KH <gregkh@...e.de>,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Zachary Amsden <zamsden@...hat.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>
Subject: Re: [patch 134/149] x86, paravirt: Add a global synchronization
	point for pvclock

On Thu, 08 Jul 2010, Gleb Natapov wrote:

> > > And what if you provide -cpu qemu64,-kvmclock to qemu command line?
> > 
> > Adding that to the glob of options that already were there from libvirt
> > didn't disable it, but using an LD_PRELOAD wrapper[1] to that purpose on
> > the host when starting kvm did help.
> > 
> Strange. -kvmclock should have had the same effect. What qemu is it?
> What is your command line?

| QEMU PC emulator version 0.11.1 (qemu-kvm-0.11.1), Copyright (c) 2003-2008 Fabrice Bellard
from the debian package qemu-kvm (0.11.1+dfsg-1~bpo50+1)

/usr/bin/kvm -S -M pc-0.11 -enable-kvm -m 512 -smp 1 -name zoe -uuid 1885e784-c831-4ef8-9576-8eaa9abf3a8b -monitor unix:/var/lib/libvirt/qemu/zoe.monitor,server,nowait -boot c -drive file=/dev/vg_sookie_system/zoe-boot,if=ide,bus=0,unit=0,boot=on -drive file=/dev/vg_sookie_system/zoe-root,if=virtio -drive file=/dev/vg_sookie_system/zoe-swap,if=virtio -net nic,macaddr=00:16:36:40:00:0b,vlan=0,model=virtio,name=net0 -net tap,fd=25,vlan=0,name=hostnet0 -net nic,macaddr=00:16:36:40:05:0b,vlan=1,model=virtio,name=net1 -net tap,fd=28,vlan=1,name=hostnet1 -serial none -parallel none -usb -vnc 127.0.0.1:10 -vga cirrus -balloon virtio

And I had added "-cpu qemu64,-kvmclock" to that at either the front or the end.

Cheers,
[should we trim the CC list?  If yes, to what?]
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