From: Frederic Weisbecker <frederic@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
Wanpeng Li <wanpengli@tencent.com>,
Thomas Gleixner <tglx@linutronix.de>,
Yauheni Kaliuta <yauheni.kaliuta@redhat.com>,
Rik van Riel <riel@redhat.com>
Subject: Re: [PATCH 0/2] vtime: Remove pair of seqcount on context switch
Date: Mon, 7 Oct 2019 18:51:41 +0200 [thread overview]
Message-ID: <20191007165140.GA31013@lenoir> (raw)
In-Reply-To: <20191007162031.GA7676@gmail.com>
On Mon, Oct 07, 2019 at 06:20:31PM +0200, Ingo Molnar wrote:
>
> * Frederic Weisbecker <frederic@kernel.org> wrote:
>
> > Extracted from a larger queue that fixes kcpustat on nohz_full, these
> > two patches have value on their own as they remove two write barriers
> > on nohz_full context switch.
> >
> > Frederic Weisbecker (2):
> > vtime: Rename vtime_account_system() to vtime_account_kernel()
> > vtime: Spare a seqcount lock/unlock cycle on context switch
> >
> > arch/ia64/kernel/time.c | 4 +--
> > arch/powerpc/kernel/time.c | 6 ++--
> > arch/s390/kernel/vtime.c | 4 +--
> > include/linux/context_tracking.h | 4 +--
> > include/linux/vtime.h | 38 ++++++++++++------------
> > kernel/sched/cputime.c | 50 ++++++++++++++++++--------------
> > 6 files changed, 57 insertions(+), 49 deletions(-)
>
> Which tree is this against? Doesn't apply cleanly to v5.4-rc2 nor v5.3.
> Does it have any prereqs perhaps?
Indeed, you need to apply this fix first: https://lore.kernel.org/lkml/20190925214242.21873-1-frederic@kernel.org/
"[PATCH] sched/vtime: Fix guest/system mis-accounting on task switch"
Thanks!
prev parent reply other threads:[~2019-10-07 16:51 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-03 16:17 [PATCH 0/2] vtime: Remove pair of seqcount on context switch Frederic Weisbecker
2019-10-03 16:17 ` [PATCH 1/2] vtime: Rename vtime_account_system() to vtime_account_kernel() Frederic Weisbecker
2019-10-09 12:59 ` [tip: sched/core] sched/cputime: " tip-bot2 for Frederic Weisbecker
2019-10-03 16:17 ` [PATCH 2/2] vtime: Spare a seqcount lock/unlock cycle on context switch Frederic Weisbecker
2019-10-09 12:59 ` [tip: sched/core] sched/cputime: " tip-bot2 for Frederic Weisbecker
2019-10-07 16:20 ` [PATCH 0/2] vtime: Remove pair of seqcount " Ingo Molnar
2019-10-07 16:51 ` Frederic Weisbecker [this message]
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