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Date: Tue, 18 May 2010 18:52:16 +0200 From: Peter Zijlstra <peterz@...radead.org> To: "H. Peter Anvin" <hpa@...or.com> Cc: Andi Kleen <andi@...stfloor.org>, Arjan van de Ven <arjan@...radead.org>, Dan Magenheimer <dan.magenheimer@...cle.com>, Thomas Gleixner <tglx@...utronix.de>, Venkatesh Pallipadi <venki@...gle.com>, Ingo Molnar <mingo@...e.hu>, chris.mason@...cle.com, linux-kernel@...r.kernel.org Subject: Re: [PATCH] x86: Export tsc related information in sysfs On Tue, 2010-05-18 at 09:40 -0700, H. Peter Anvin wrote: > > The problem is that you throw the baby (vsyscall) out with the bathwater > (user rdtsc). Well, we could only flip the CR4 bit when we mark the TSC unsuitable for gtod. That should be plenty good to tag all userspace trying to use it, since more than half my machines don't use TSC for clocksource. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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