Messages in this thread | | | Date | Tue, 26 Oct 2010 15:18:43 +0200 | From | Borislav Petkov <> | Subject | Re: Clocksource tsc unstable (delta = -8589361717 ns) in current git |
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On Tue, Oct 26, 2010 at 07:20:52AM -0400, Markus Trippelsdorf wrote: > On my AMD system the following kernel messages are sometimes printed > after several hours of uptime: > Clocksource tsc unstable (delta = -8589361717 ns) > Switching to clocksource hpet
This is strange, tsc is actually stable on your F10h revC.
> This happened several times already: > # grep "Clocksource" kernel.* > kernel.log:Oct 24 18:31:17 arch kernel: Clocksource tsc unstable (delta = -8591703466 ns) > kernel.log:Oct 26 12:54:38 arch kernel: Clocksource tsc unstable (delta = -8589361717 ns) > kernel.log.1:Oct 22 21:43:51 arch kernel: Clocksource tsc unstable (delta = -25772316650 ns)
Do you have any warnings/oopses before that, can we have the whole dmesg with the above messages?
> The computer is nearly unusable afterwards (second long delays, that > seem to grow larger and larger) and only a prompt reboot can fix the > problem. > I'm running the latest git kernel. Version 2.6.36 does not show these > symptoms. > > Dmesg and kernel config are attached. > > -- > Markus
> Initializing cgroup subsys cpu > Linux version 2.6.36-05618-gb18cae4-dirty (markus@arch.trippelsdorf.de) (gcc version 4.5.1 (GCC) ) #41 SMP PREEMPT Tue Oct 26 06:51:47 CEST 2010
...-dirty means you have some changes ontop of b18cae4. What are those?
> Command line: root=/dev/sdb2 fbcon=rotate:3 quiet kexec_jump_back_entry=0x23d64482b7e72bb7 > BIOS-provided physical RAM map:
otherwise, I don't see anything strange in your dmesg. Unless tglx has a better idea, I'd ask you to bisect it. 5618 changesets shouldn't be that much but I don't know, if the issue appears every several hours it could still be tedious.
Thanks.
-- Regards/Gruss, Boris.
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