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Message-ID: <20110325111140.GB29521@elte.hu>
Date:	Fri, 25 Mar 2011 12:11:40 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	Eric Dumazet <eric.dumazet@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jack Steiner <steiner@....com>,
	Jan Beulich <JBeulich@...ell.com>,
	Borislav Petkov <bp@...64.org>,
	Nick Piggin <npiggin@...nel.dk>,
	"x86@...nel.org" <x86@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...hat.com>, tee@....com,
	Nikanth Karthikesan <knikanth@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock
 if possible


* Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:

> On Fri, 2011-03-25 at 10:59 +0100, Ingo Molnar wrote:
> > 
> > Wanted to keep this patch simple - we are not really hitting MSR failure cases 
> > in practice, 
> 
> Everything qemu/kvm hits those.

and other virtualizers as well. I meant on real hardware with a real BIOS.

Thanks,

	Ingo
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