Re: [GIT PULL v2] timers updates for 3.15

From: Ingo Molnar
Date: Thu Mar 13 2014 - 07:05:28 EST



* Frederic Weisbecker <fweisbec@xxxxxxxxx> wrote:

> Ingo, Thomas,
>
> Please pull the timers/cputime-fix-steal-v3 branch that can be found at:
>
> git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
> timers/cputime-fix-steal-v3
>
> Only the last patch changed to address Peterz concern on arch Kbuild
> layout. This got sorted out by running the script from b119fa61d440f
> to alpabetically sort the entries.
>
> ---
> The main purpose of this set is to fix a bug on full dynticks configs
> where steal time accounting appears to be zero in /proc/stat even
> after a few seconds of competing guests running busy loops in a same
> host CPU. It's not a regression though as it was there since the
> beginning with full dynticks.
>
> So patch [4/6] ("cputime: Fix jiffies based cputime assumption on
> steal accounting") is the most important patch of the series. The rest
> is mostly preparatory work to fix the bug plus various cleanups.
>
> Thanks,
> Frederic
> ---
>
> Frederic Weisbecker (6):
> cputime: Fix nsecs_to_cputime() return type cast
> cputime: Default implementation of nsecs -> cputime conversion
> cputime: Bring cputime -> nsecs conversion
> cputime: Fix jiffies based cputime assumption on steal accounting
> sched: Remove needless round trip nsecs <-> tick conversion of steal time
> arch: Remove stub cputime.h headers
>
>
> arch/alpha/include/asm/Kbuild | 7 ++++---
> arch/alpha/include/asm/cputime.h | 6 ------
> arch/cris/include/asm/Kbuild | 3 ++-
> arch/cris/include/asm/cputime.h | 6 ------
> arch/frv/include/asm/Kbuild | 5 +++--
> arch/frv/include/asm/cputime.h | 6 ------
> arch/m32r/include/asm/Kbuild | 5 +++--
> arch/m32r/include/asm/cputime.h | 6 ------
> arch/microblaze/include/asm/Kbuild | 5 +++--
> arch/microblaze/include/asm/cputime.h | 1 -
> arch/mn10300/include/asm/Kbuild | 3 ++-
> arch/mn10300/include/asm/cputime.h | 1 -
> arch/score/include/asm/Kbuild | 4 ++--
> arch/score/include/asm/cputime.h | 6 ------
> arch/x86/include/asm/Kbuild | 1 +
> arch/x86/include/asm/cputime.h | 1 -

Does this tree also address the heavy conflicts with tip:core/locking?
If not then we should probably carry this in a separate branch that
merges tip:core/locking and tip:timers/core.

Thanks,

Ingo
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