* [GIT PULL clocksource] Clocksource watchdog commits for v5.14
@ 2021-06-09 23:37 Paul E. McKenney
2021-06-18 16:00 ` Thomas Gleixner
0 siblings, 1 reply; 2+ messages in thread
From: Paul E. McKenney @ 2021-06-09 23:37 UTC (permalink / raw)
To: tglx
Cc: linux-kernel, john.stultz, sboyd, corbet, Mark.Rutland, maz,
kernel-team, neeraju, ak, feng.tang, zhengjun.xing, luming.yu
Hello, Thomas,
This pull request contains changes to cause the clocksource watchdog to
reject measurement noise caused by delays between clocksource reads.
These have been posted a few times to LKML, most recently v15:
https://lore.kernel.org/lkml/20210527190042.GA438700@paulmck-ThinkPad-P17-Gen-1/
These have been acked by Feng Tang and reviewed by Luming Yu. These have
also been subjected to subjected to the kbuild test robot and -next
testing, and are available in the git repository based on v5.13-rc1 at:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git clocksource
for you to fetch changes up to 023766fbdde49c75c13acd268bf9af810d624c59:
clocksource: Print deviation in nanoseconds for unstable case (2021-06-04 13:20:31 -0700)
----------------------------------------------------------------
Feng Tang (1):
clocksource: Print deviation in nanoseconds for unstable case
Paul E. McKenney (5):
clocksource: Retry clock read if long delays detected
clocksource: Check per-CPU clock synchronization when marked unstable
clocksource: Limit number of CPUs checked for clock synchronization
clocksource: Reduce clocksource-skew threshold for TSC
clocksource: Provide kernel module to test clocksource watchdog
Documentation/admin-guide/kernel-parameters.txt | 22 +++
arch/x86/kernel/tsc.c | 4 +-
include/linux/clocksource.h | 8 +-
kernel/time/Makefile | 1 +
kernel/time/clocksource-wdtest.c | 202 +++++++++++++++++++++
kernel/time/clocksource.c | 226 ++++++++++++++++++++++--
kernel/time/jiffies.c | 15 +-
lib/Kconfig.debug | 12 ++
8 files changed, 468 insertions(+), 22 deletions(-)
create mode 100644 kernel/time/clocksource-wdtest.c
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [GIT PULL clocksource] Clocksource watchdog commits for v5.14
2021-06-09 23:37 [GIT PULL clocksource] Clocksource watchdog commits for v5.14 Paul E. McKenney
@ 2021-06-18 16:00 ` Thomas Gleixner
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Gleixner @ 2021-06-18 16:00 UTC (permalink / raw)
To: paulmck
Cc: linux-kernel, john.stultz, sboyd, corbet, Mark.Rutland, maz,
kernel-team, neeraju, ak, feng.tang, zhengjun.xing, luming.yu
On Wed, Jun 09 2021 at 16:37, Paul E. McKenney wrote:
> This pull request contains changes to cause the clocksource watchdog to
> reject measurement noise caused by delays between clocksource reads.
> These have been posted a few times to LKML, most recently v15:
>
> https://lore.kernel.org/lkml/20210527190042.GA438700@paulmck-ThinkPad-P17-Gen-1/
>
> These have been acked by Feng Tang and reviewed by Luming Yu. These have
> also been subjected to subjected to the kbuild test robot and -next
> testing, and are available in the git repository based on v5.13-rc1 at:
I'll go through them soon. Sorry for the delay.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-06-09 23:37 [GIT PULL clocksource] Clocksource watchdog commits for v5.14 Paul E. McKenney
2021-06-18 16:00 ` Thomas Gleixner
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