From: Tomasz Chmielewski <mangoo@wpkg.org>
To: "kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: why guests show "Clocksource tsc unstable" on bootup?
Date: Mon, 09 Mar 2009 13:01:15 +0100 [thread overview]
Message-ID: <49B5050B.9050204@wpkg.org> (raw)
Why do my guests show "Clocksource tsc unstable" on bootup?
dmesg shows that kvm-clock was set as the primary cpu clock.
Yet a bit later kernel says "Clocksource tsc unstable".
Is it something to worry about, or perhaps calculating tsc is hardcoded?
And as such, will be always checked?
Or, is it host CPU related?
[ 0.000000] kvm-clock: cpu 0, msr 0:3baf81, boot clock
[ 0.000000] kvm-clock: cpu 0, msr 0:1208f81, primary cpu clock
[ 0.000000] Kernel command line: root=/dev/vda1 ro quiet clocksource=kvm-clock
[ 1.253602] rtc_cmos 00:01: setting system clock to 2009-03-09 11:41:30 UTC (1236598890)
[ 41.500623] Clocksource tsc unstable (delta = -153498948 ns)
--
Tomasz Chmielewski
http://wpkg.org
next reply other threads:[~2009-03-09 12:01 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-09 12:01 Tomasz Chmielewski [this message]
2009-03-15 12:56 ` why guests show "Clocksource tsc unstable" on bootup? Avi Kivity
2009-03-15 13:06 ` Tomasz Chmielewski
2009-03-15 13:14 ` Michael Tokarev
2009-03-15 13:20 ` Avi Kivity
2009-03-15 13:31 ` Avi Kivity
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