linux-kernel - Re: [patch for 2.6.30 2/2] arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c: avoid cross-CPU interrupts

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Message-id: <alpine.LFD.2.00.0904192320450.10996@localhost.localdomain>
Date:	Sun, 19 Apr 2009 23:22:36 -0400 (EDT)
From:	Len Brown <lenb@...nel.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Jones <davej@...hat.com>, linux-acpi@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	efault@....de, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Venkatesh Pallipadi <venkatesh.pallipadi@...el.com>,
	yakui.zhao@...el.com, yanmin_zhang@...ux.intel.com
Subject: Re: [patch for 2.6.30 2/2] arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c:
 avoid cross-CPU interrupts


> Andrew points out that acpi-cpufreq uses cpumask_any, when it really
> would prefer to use the same CPU if possible (to avoid an IPI).  In
> general, this seems a good idea to offer.

I like this idea.

I'll drop andrew's patch "acpi-cpufreq.c: avoid cross-CPU interrupts"
b/c that is not an emergency and this is more clever.

thanks,
-Len Brown, Intel Open Source Technology Center.
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