linux-kernel - Re: [PATCH 2/5] trace-cmd: Use tracing directory to count CPUs

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Message-ID: <1345642893.5069.31.camel@gandalf.local.home>
Date:	Wed, 22 Aug 2012 09:41:33 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
Cc:	Amit Shah <amit.shah@...hat.com>,
	Anthony Liguori <anthony@...emonkey.ws>,
	Arnd Bergmann <arnd@...db.de>, Borislav Petkov <bp@...64.org>,
	"Franch Ch. Eigler" <fche@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	Ingo Molnar <mingo@...hat.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, qemu-devel@...gnu.org,
	yrl.pp-manager.tt@...achi.com
Subject: Re: [PATCH 2/5] trace-cmd: Use tracing directory to count CPUs

On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
> From: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> 
> Count debugfs/tracing/per_cpu/cpu* to determine the
> number of CPUs.

I'm curious, do you find that sysconf doesn't return the # of CPUs the
system has? I've had boxes where the per_cpu/cpu* had more cpus than the
box actually holds. But this was a bug in the kernel, not the tool. This
change log needs to have rational instead of just explaining what the
patch does.

Thanks,

-- Steve

> 
> Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
> Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@...achi.com>
> ---


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