From: Zachary Amsden <zach-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
To: Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>
Cc: jeremy-TSDbQ3PG+2Y@public.gmane.org,
avi-i/T1Zxg06OZWk0Htik3J/w@public.gmane.org,
kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
Dan Hecht <dhecht-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Glauber de Oliveira Costa
<gcosta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Glauber de Oliveira Costa
<glauber-aMxvdZfKFXomYvmMESoHnA@public.gmane.org>,
--cc-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org,
Garrett Smith <garrett-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH] raise tsc clocksource rating
Date: Mon, 29 Oct 2007 15:55:05 -0700 [thread overview]
Message-ID: <1193698505.9793.90.camel@bodhitayantram.eng.vmware.com> (raw)
In-Reply-To: <20071029224852.GA27547-X9Un+BFzKDI@public.gmane.org>
On Mon, 2007-10-29 at 23:48 +0100, Ingo Molnar wrote:
> * Zachary Amsden <zach-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org> wrote:
> if it's inaccurate why are you exposing it to the guest then? Native
> only uses the TSC if it's safe and accurate to do so.
Not every guest support paravirt, but for correctness, all guests
require TSC, which must be exposed all the way up to userspace, no
matter what the efficiency or accuracy may be.
Zach
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next prev parent reply other threads:[~2007-10-29 22:55 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-29 23:10 [PATCH] raise tsc clocksource rating Glauber de Oliveira Costa
[not found] ` <11936994092607-git-send-email-gcosta-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2007-10-29 22:17 ` Thomas Gleixner
2007-10-29 22:36 ` Ingo Molnar
2007-10-30 1:26 ` john stultz
[not found] ` <alpine.LFD.0.9999.0710292315280.3186-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2007-10-30 2:39 ` Rusty Russell
[not found] ` <200710301339.23628.rusty-8n+1lVoiYb80n/F98K4Iww@public.gmane.org>
2007-10-30 7:37 ` Ingo Molnar
[not found] ` <20071030073736.GA21843-X9Un+BFzKDI@public.gmane.org>
2007-10-30 10:52 ` Rusty Russell
2007-10-30 12:13 ` Glauber de Oliveira Costa
2007-10-29 22:42 ` Zachary Amsden
[not found] ` <1193697734.9793.86.camel-cxY/u30q8FloTgUnLF1by8fTvwmfpRNyZeezCHUQhQ4@public.gmane.org>
2007-10-29 22:45 ` Jeremy Fitzhardinge
2007-10-29 22:48 ` Ingo Molnar
[not found] ` <20071029224852.GA27547-X9Un+BFzKDI@public.gmane.org>
2007-10-29 22:52 ` Jeremy Fitzhardinge
2007-10-29 22:55 ` Ingo Molnar
[not found] ` <20071029225528.GA31293-X9Un+BFzKDI@public.gmane.org>
2007-10-29 23:17 ` Jeremy Fitzhardinge
[not found] ` <47266A00.4040408-TSDbQ3PG+2Y@public.gmane.org>
2007-10-29 23:21 ` Ingo Molnar
[not found] ` <20071029232140.GA10518-X9Un+BFzKDI@public.gmane.org>
2007-10-29 23:33 ` Jeremy Fitzhardinge
2007-10-30 0:45 ` Ian Pratt
[not found] ` <8A87A9A84C201449A0C56B728ACF491E34C5F5-sZfJFUT1i4lUWNNKjvdVWtlxNDNUtst69dF7HbQ/qKg@public.gmane.org>
2007-10-30 7:19 ` Ingo Molnar
2007-10-29 22:55 ` Zachary Amsden [this message]
2007-10-29 23:02 ` Ingo Molnar
2007-10-29 23:13 ` Zachary Amsden
[not found] ` <1193699638.9793.97.camel-cxY/u30q8FloTgUnLF1by8fTvwmfpRNyZeezCHUQhQ4@public.gmane.org>
2007-10-29 23:17 ` Ingo Molnar
2007-10-30 12:02 ` Glauber de Oliveira Costa
[not found] ` <47271D4A.8030707-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2007-10-30 17:58 ` Zachary Amsden
[not found] ` <20071029230213.GA1982-X9Un+BFzKDI@public.gmane.org>
2007-10-29 23:24 ` Dan Hecht
[not found] ` <47266B90.8000008-pghWNbHTmq7QT0dZR+AlfA@public.gmane.org>
2007-10-30 4:24 ` Avi Kivity
2007-10-30 7:14 ` Ingo Molnar
[not found] ` <1193698505.9793.90.camel-cxY/u30q8FloTgUnLF1by8fTvwmfpRNyZeezCHUQhQ4@public.gmane.org>
2007-10-30 11:59 ` Glauber de Oliveira Costa
2007-10-30 0:17 ` H. Peter Anvin
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