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Re: [git pull] core/percpu for v2.6.27

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From: Linus Torvalds <torvalds@...>
To: Ingo Molnar <mingo@...>
Cc: <linux-kernel@...>, Peter Zijlstra <a.p.zijlstra@...>, Thomas Gleixner <tglx@...>, Andrew Morton <akpm@...>
Subject: Re: [git pull] core/percpu for v2.6.27
Date: Monday, July 14, 2008 - 6:27 pm

On Mon, 14 Jul 2008, Ingo Molnar wrote:

Can you explain what this does and who needs it? The percpu_xchg() looks 
particularly pointless, since it's always a locked SMP-safe instruction on 
x86, so a nonpreemptible load+store will likely be much faster.

			Linus
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Messages in current thread:
[git pull] core/percpu for v2.6.27, Ingo Molnar, (Mon Jul 14, 10:34 am)
Re: [git pull] core/percpu for v2.6.27, Linus Torvalds, (Mon Jul 14, 6:27 pm)
Re: [git pull] core/percpu for v2.6.27, Jeremy Fitzhardinge, (Tue Jul 15, 11:46 am)
Re: [git pull] core/percpu for v2.6.27, Ingo Molnar, (Tue Jul 15, 5:00 pm)
Re: [git pull] core/percpu for v2.6.27, Mike Travis, (Tue Jul 15, 5:26 pm)
Re: [git pull] core/percpu for v2.6.27, Ingo Molnar, (Fri Jul 18, 6:17 pm)
Re: [git pull] core/percpu for v2.6.27, Mike Travis, (Fri Jul 25, 11:18 am)
Re: [git pull] core/percpu for v2.6.27, Mike Travis, (Fri Jul 18, 6:54 pm)
Re: [git pull] core/percpu for v2.6.27, H. Peter Anvin, (Tue Jul 15, 5:46 pm)