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Re: [PATCH 2/2] Revert "nohz: Fix idle ticks in cpu summary line of /pro

To: Srivatsa Vaddagiri <vatsa@codeaurora.org>
Subject: Re: [PATCH 2/2] Revert "nohz: Fix idle ticks in cpu summary line of /proc/stat" (commit 7386cdbf2f57ea8cff3c9fde93f206e58b9fe13f).
From: Sergei Shtylyov <sshtylyov@mvista.com>
Date: Fri, 04 Jan 2013 16:13:42 +0400
Cc: Russell King <linux@arm.linux.org.uk>, "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>, Stephen Boyd <sboyd@codeaurora.org>, linux-arm-kernel@lists.infradead.org, Mike Frysinger <vapier@gentoo.org>, uclinux-dist-devel@blackfin.uclinux.org, Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org, Benjamin Herrenschmidt <benh@kernel.crashing.org>, linuxppc-dev@lists.ozlabs.org, Martin Schwidefsky <schwidefsky@de.ibm.com>, linux-s390@vger.kernel.org, Paul Mundt <lethal@linux-sh.org>, linux-sh@vger.kernel.org, "David S. Miller" <davem@davemloft.net>, sparclinux@vger.kernel.org, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>, x86@kernel.org, mhocko@suse.cz, srivatsa.bhat@linux.vnet.ibm.com, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
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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@suse.cz
Cc: srivatsa.bhat@linux.vnet.ibm.com
Signed-off-by: Srivatsa Vaddagiri <vatsa@codeaurora.org>

WBR, Sergei


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