[Bugme-janitors] [Bug 14426] CE: hpet increasing min_delta_ns flood
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Mon Nov 2 22:32:04 PST 2009
http://bugzilla.kernel.org/show_bug.cgi?id=14426
--- Comment #2 from Andrew Morton <akpm at linux-foundation.org> 2009-11-03 06:32:04 ---
(arg, resend with reporter cc'ed)
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On Sat, 17 Oct 2009 09:29:35 GMT bugzilla-daemon at bugzilla.kernel.org wrote:
> http://bugzilla.kernel.org/show_bug.cgi?id=14426
>
> Summary: CE: hpet increasing min_delta_ns flood
> Product: Timers
> Version: 2.5
> Kernel Version: 2.6.31.4
> Platform: All
> OS/Version: Linux
> Tree: Mainline
> Status: NEW
> Severity: normal
> Priority: P1
> Component: Realtime Clock
> AssignedTo: timers_realtime-clock at kernel-bugs.osdl.org
> ReportedBy: thibm at free.fr
> Regression: Yes
>
>
> Created an attachment (id=23447)
--> (http://bugzilla.kernel.org/attachment.cgi?id=23447)
> --> (http://bugzilla.kernel.org/attachment.cgi?id=23447)
> lshw + kernel config file
>
> Hello,
>
> With 2.6.31.4, dmesg :
>
> [ 92.387360] CE: hpet increasing min_delta_ns to 15000 nsec
> [ 283.944283] CE: hpet increasing min_delta_ns to 22500 nsec
> [ 647.384454] CE: hpet increasing min_delta_ns to 33750 nsec
> [ 767.384264] CE: hpet increasing min_delta_ns to 50624 nsec
> [ 908.384290] CE: hpet increasing min_delta_ns to 75936 nsec
> [ 956.384337] CE: hpet increasing min_delta_ns to 113904 nsec
> [ 977.384378] CE: hpet increasing min_delta_ns to 170856 nsec
> [ 1004.384320] CE: hpet increasing min_delta_ns to 256284 nsec
> [ 1169.384432] CE: hpet increasing min_delta_ns to 384426 nsec
> [ 1265.387316] CE: hpet increasing min_delta_ns to 576638 nsec
> [ 1268.384294] CE: hpet increasing min_delta_ns to 864956 nsec
>
>
> with 2.6.31.3 and before messages don't go above 33750.
>
>
> My system is a laptop using x86_64 ubuntu karmic snapshot, custom kernel. lshw
> + config file attached.
>
It's a regression (or at lesat a worrisome-looking change) within
-stable, and is presumably also present in 2.6.32-rcX.
ftp://ftp.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.31.4 is pretty short.
This has to be a prime suspect:
commit 112a62ddb32952943517bd170f0eeb26a6f0738f
Author: john stultz <johnstul at us.ibm.com>
Date: Thu Oct 8 13:31:45 2009 -0700
PIT fixes to unbreak suspend/resume (bug #14222)
And
commit 94c517d6c84e819035f58a4748066d1929681d0e
Author: Eero Nurkkala <ext-eero.nurkkala at nokia.com>
Date: Wed Oct 7 11:54:26 2009 +0300
NOHZ: update idle state also when NOHZ is inactive
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