linux-kernel - [PATCH 0/5] sched/cputime: irqtime cleanups v2

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Date:   Mon, 26 Sep 2016 02:29:16 +0200
From:   Frederic Weisbecker <fweisbec@...il.com>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Frederic Weisbecker <fweisbec@...il.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Wanpeng Li <wanpeng.li@...mail.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Ingo Molnar <mingo@...nel.org>, Mike Galbraith <efault@....de>,
        Rik van Riel <riel@...hat.com>
Subject: [PATCH 0/5] sched/cputime: irqtime cleanups v2

This second version fixes the ifdeffery issues reported by Paolo Bonzini
and includes Rick's reviewed-by tags.

I also intended to include Peterz's patch for lockdep assertion on irqs
disabled but unfortunately I get false positives as irqs_disabled()
doesn't always imply !current->hardirqs_enabled. This seems to happen
during the boot with IRQs interrupting lockdep internals while
current->lockdep_recursion == 1. Therefore the trace_hardirqs_off() on
x86 IRQ entry gets ignored. I'll investigate further and try to get
that fixed in order to introduce lockdep_assert_irqs_disabled() properly
but that's outside the scope of this patchset now.

git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
	sched/irqtime-v2

HEAD: e336b2491bf02e95ff3387e7d7a8276b22c8b5f3

Thanks,
	Frederic
---

Frederic Weisbecker (5):
      irqtime: No need for preempt-safe accessors
      irqtime: Remove needless IRQs disablement on kcpustat update
      u64_stats: Introduce IRQs disabled helpers
      irqtime: Consolidate accounting synchronization with u64_stats API
      irqtime: Consolidate irqtime flushing code

 include/linux/u64_stats_sync.h | 45 +++++++++++++++++++----------------
 kernel/sched/cputime.c         | 54 ++++++++++++++++++------------------------
 kernel/sched/sched.h           | 53 ++++++++++++-----------------------------
 3 files changed, 62 insertions(+), 90 deletions(-)