linux-kernel - [PATCH v2 0/2] sched/cputime: sum_exec

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Message-Id: <1473066782-19372-1-git-send-email-sgruszka@redhat.com>
Date:   Mon,  5 Sep 2016 11:13:00 +0200
From:   Stanislaw Gruszka <sgruszka@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     Giovanni Gherdovich <ggherdovich@...e.cz>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Mike Galbraith <mgalbraith@...e.de>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Rik van Riel <riel@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Wanpeng Li <wanpeng.li@...mail.com>,
        Ingo Molnar <mingo@...nel.org>,
        Stanislaw Gruszka <sgruszka@...hat.com>
Subject: [PATCH v2 0/2] sched/cputime: sum_exec_runtime fixes for 32-bit cpus

Optimize read_sum_exec_runtime() on 32-bit cpus by taking only p->pi_lock
and use above function to protect reads of 64bit sum_exec_runtime on
other places on 32 bit architectures.

Stanislaw Gruszka (2):
  sched/cputime: Use only pi_lock to protect sum_exec_runtime read
  sched/cputime: Protect other sum_exec_runtime reads on 32 bit cpus

 fs/proc/base.c                 |  2 +-
 include/linux/sched.h          | 18 ++++++++++++++++++
 kernel/delayacct.c             |  2 +-
 kernel/exit.c                  |  2 +-
 kernel/sched/cputime.c         | 22 +---------------------
 kernel/time/posix-cpu-timers.c |  4 ++--
 6 files changed, 24 insertions(+), 26 deletions(-)

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1.8.3.1