From: Johannes Stezenbach <js@sig21.net>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Subject: linux-3.2.1 + KVM: TSC unstable on Core i5-2400S / H67
Date: Tue, 24 Jan 2012 12:36:08 +0100 [thread overview]
Message-ID: <20120124113608.GA16876@sig21.net> (raw)
Hi,
I just got the following in dmesg with linux-3.2.1:
[23379.612251] usb 2-1.2: new high-speed USB device number 6 using ehci_hcd
[ 0.006666] Marking TSC unstable due to KVM discovered backwards TSC
[23421.511167] Switching to clocksource hpet
The mainboard is an Asus P8H67-V, BIOS 0806 10/26/2011 with Core i5-2400S.
The kvm instance was running for a day already, and there was an overnight
suspend-to-disk cycle in between, but the above happened ~1 hour after resume.
(I don't think the usb message has anything to do with it, it's just
the last message before the TSC message.)
Hm, checking /var/log/kern.* it seems this also happened with
linux-3.1.* without me noticing.
Should I be worried? I thought Core-i5 processors have a stable TSC?
Johannes
next reply other threads:[~2012-01-24 11:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-24 11:36 Johannes Stezenbach [this message]
2012-01-25 12:27 ` linux-3.2.1 + KVM: TSC unstable on Core i5-2400S / H67 Marcelo Tosatti
2012-01-25 13:25 ` Johannes Stezenbach
2012-01-26 9:46 ` Johannes Stezenbach
2012-01-26 14:43 ` Jan Kiszka
2012-01-26 15:35 ` Johannes Stezenbach
2012-01-26 16:48 ` Marcelo Tosatti
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