linux-kernel - Re: [PATCH 2/2] Revert "nohz: Fix idle ticks in cpu summary line of /proc/stat" (commit 7386cdbf2f57ea8cff3c9fde93f206e58b9fe13f).

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Date:	Fri, 04 Jan 2013 16:13:42 +0400
From:	Sergei Shtylyov <sshtylyov@...sta.com>
To:	Srivatsa Vaddagiri <vatsa@...eaurora.org>
CC:	Russell King <linux@....linux.org.uk>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	linux-arm-kernel@...ts.infradead.org,
	Mike Frysinger <vapier@...too.org>,
	uclinux-dist-devel@...ckfin.uclinux.org,
	Ralf Baechle <ralf@...ux-mips.org>, linux-mips@...ux-mips.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	linuxppc-dev@...ts.ozlabs.org,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	linux-s390@...r.kernel.org, Paul Mundt <lethal@...ux-sh.org>,
	linux-sh@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	sparclinux@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org, mhocko@...e.cz,
	srivatsa.bhat@...ux.vnet.ibm.com, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH 2/2] Revert "nohz: Fix idle ticks in cpu summary line
 of /proc/stat" (commit 7386cdbf2f57ea8cff3c9fde93f206e58b9fe13f).

Hello.

On 04-01-2013 6:58, Srivatsa Vaddagiri wrote:

> With offline cpus no longer beeing seen in nohz mode (ts->idle_active=0), we
> don't need the check for cpu_online() introduced in commit 7386cdbf. Offline

    Please also specify the summary of that commit in parens (or however you 
like).

> cpu's idle time as last recorded in its ts->idle_sleeptime will be reported
> (thus excluding its offline time as part of idle time statistics).

> Cc: mhocko@...e.cz
> Cc: srivatsa.bhat@...ux.vnet.ibm.com
> Signed-off-by: Srivatsa Vaddagiri <vatsa@...eaurora.org>

WBR, Sergei

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