linux-kernel - Re: [PATCH 13/15] sched: Use a static_key for sched_clock

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Message-ID: <20140124031551.GC4922@dhcp-16-126.nay.redhat.com>
Date:	Fri, 24 Jan 2014 11:15:51 +0800
From:	Dave Young <dyoung@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Sasha Levin <sasha.levin@...cle.com>,
	Arjan van de Ven <arjan@...ux.intel.com>, lenb@...nel.org,
	rjw@...ysocki.net, Eliezer Tamir <eliezer.tamir@...ux.intel.com>,
	rui.zhang@...el.com, jacob.jun.pan@...ux.intel.com,
	Mike Galbraith <bitbucket@...ine.de>,
	Ingo Molnar <mingo@...nel.org>, hpa@...or.com,
	paulmck@...ux.vnet.ibm.com, Thomas Gleixner <tglx@...utronix.de>,
	John Stultz <john.stultz@...aro.org>,
	Andy Lutomirski <luto@...capital.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/15] sched: Use a static_key for sched_clock_stable

On 01/23/14 at 05:56pm, Peter Zijlstra wrote:
> On Thu, Jan 23, 2014 at 10:10:28AM +0800, Dave Young wrote:
> > Hmm, seems the my physical machine is booting fine with this patch. kvm
> > guest problem still exist, but that kvm thing might be other problem.
> 
> Dave, could you try with tip/master, Ingo pushed out all the fixes
> gathered.

tip/master works fine for me.

> 
> Lacking that, could you perhaps provide the .config you use for your
> guest and a kvm invocation?
> 
> I used a defconfig with KVM_GUEST=y, which was enough to enable kvmclock
> support and then started with:
> 
> kvm -kernel defconfig-build/arch/x86/boot/bzImage -nographic -append "console=ttyS0" -smp 2

I use qemu-system-x86_64 with efi ovmf firmware, I think the problem
has been resolved in tip/master, if you still want the .config please
let me know.

Thanks
Dave
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