From: Frederic Weisbecker <fweisbec@gmail.com>
To: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Michael Neuling <mikey@neuling.org>,
ppc-dev <linuxppc-dev@lists.ozlabs.org>,
Martin Schwidefsky <schwidefsky@de.ibm.com>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
linux-s390 <linux-s390@vger.kernel.org>
Subject: Re: [PATCH 0/4] cputime: some optimizations and cleanups
Date: Wed, 9 Nov 2016 13:01:25 +0000 [thread overview]
Message-ID: <CAFTL4hwQj_feMtKuTZC-u-Og+-H8VJJeVGeOYmuc0iZ_wPeuTQ@mail.gmail.com> (raw)
In-Reply-To: <1477917389-11341-1-git-send-email-sgruszka@redhat.com>
2016-10-31 12:36 GMT+00:00 Stanislaw Gruszka <sgruszka@redhat.com>:
> Patches remove accounting of utimescaled/stimescaled on architectures
> that do not provide those values (scaled cputimes are equal to normal
> cputimes) what is every architecture except powerpc and s390.
>
> Patches do not change user visible behaviour.
>
> There is very little documentation how scaled cputimes should be
> interpreted and what useful information they provide (at least
> I could not find that). Moreover they are exported to user-space
> only via not commonly used taskstats and delayacct interfaces (i.e.
> interfaces that are not used by standard linux tools AFICT). However
> I assume they can not be removed by whole (i.e. replaced by normal
> utimes/stimes on powerpc and s390).
>
> Stanislaw Gruszka (4):
> cputime/powerpc: remove cputime_last_delta global variable
> cputime/powerpc: remove cputime_to_scaled()
> cputime/powerpc/s390: make scaled cputime arch specific
> cputime: simplify task_cputime()
>
> arch/ia64/kernel/time.c | 4 +-
> arch/powerpc/Kconfig | 1 +
> arch/powerpc/include/asm/cputime.h | 14 ----
> arch/powerpc/kernel/time.c | 8 +-
> arch/s390/Kconfig | 1 +
> arch/s390/kernel/vtime.c | 9 ++-
> arch/x86/kernel/apm_32.c | 4 +-
> include/asm-generic/cputime_jiffies.h | 1 -
> include/asm-generic/cputime_nsecs.h | 1 -
> include/linux/kernel_stat.h | 4 +-
> include/linux/sched.h | 29 +++++---
> kernel/fork.c | 2 +
> kernel/sched/cputime.c | 124 +++++++++------------------------
> kernel/time/posix-cpu-timers.c | 4 +-
> 14 files changed, 73 insertions(+), 133 deletions(-)
>
Excellent patchset!
Thanks a lot Stanislaw!
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
prev parent reply other threads:[~2016-11-09 13:01 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-31 12:36 [PATCH 0/4] cputime: some optimizations and cleanups Stanislaw Gruszka
2016-10-31 12:36 ` [PATCH 1/4] cputime/powerpc: remove cputime_last_delta global variable Stanislaw Gruszka
2016-11-03 0:50 ` Paul Mackerras
2016-10-31 12:36 ` [PATCH 2/4] cputime/powerpc: remove cputime_to_scaled() Stanislaw Gruszka
2016-11-03 0:51 ` Paul Mackerras
2016-10-31 12:36 ` [PATCH 3/4] cputime/powerpc/s390: make scaled cputime arch specific Stanislaw Gruszka
2016-10-31 13:02 ` kbuild test robot
2016-10-31 13:13 ` [PATCH v2 " Stanislaw Gruszka
2016-10-31 14:13 ` [PATCH " kbuild test robot
2016-10-31 16:21 ` [PATCH v3 " Stanislaw Gruszka
2016-11-15 10:51 ` [tip:sched/core] sched/cputime, powerpc, s390: Make " tip-bot for Stanislaw Gruszka
2016-11-02 9:11 ` [PATCH 3/4] cputime/powerpc/s390: make " Christian Borntraeger
2016-11-02 9:38 ` Stanislaw Gruszka
2016-11-02 21:22 ` Martin Schwidefsky
2016-10-31 12:36 ` [PATCH 4/4] cputime: simplify task_cputime() Stanislaw Gruszka
2016-11-09 13:01 ` Frederic Weisbecker [this message]
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