linux-kernel - Re: [PATCH v3 0/2] nohz: fix idle accounting in NO

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Date:	Tue, 15 Apr 2014 12:11:41 +0900
From:	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>
To:	linux-kernel@...r.kernel.org
CC:	Fernando Luis Vazquez Cao <fernando_b1@....ntt.co.jp>,
	Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arjan van de Ven <arjan@...ux.intel.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Preeti U Murthy <preeti@...ux.vnet.ibm.com>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	stable@...r.kernel.org
Subject: Re: [PATCH v3 0/2] nohz: fix idle accounting in NO_HZ kernels

Ping?

(2014/04/10 18:07), Hidetoshi Seto wrote:
> Hi all,
> 
> This patch set (rebased on v3.14) is my 3rd try to fix an issue
> that idle/iowait of /proc/stat can go backward. Originally reported
> by Tetsuo and Fernando at last year, Mar 2013.
> 
> This v3 takes new approach to fix the problem, and now use seqcount
> while v1 and v2 uses seqlock.
> 
> Of course still reviews are welcome!
> 
> Thanks,
> H.Seto
> 
> Hidetoshi Seto (2):
>       nohz: stop updating sleep stats from get_cpu_{idle,iowait}_time_us()
>       nohz: use delayed iowait accounting to avoid race on idle time stats
> 
>  include/linux/tick.h     |    6 ++-
>  kernel/time/tick-sched.c |  116 ++++++++++++++++++++++++++++------------------
>  2 files changed, 74 insertions(+), 48 deletions(-)


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