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Date: Wed, 23 Nov 2005 16:46:27 -0500
From: Jeff Garzik <jgarzik@pobox.com>
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To: Andi Kleen <ak@suse.de>
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>, Linus Torvalds <torvalds@osdl.org>,
       "H. Peter Anvin" <hpa@zytor.com>, Gerd Knorr <kraxel@suse.de>,
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       Pavel Machek <pavel@ucw.cz>, Andrew Morton <akpm@osdl.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Zwane Mwaikambo <zwane@arm.linux.org.uk>,
       Pratap Subrahmanyam <pratap@vmware.com>,
       Christopher Li <chrisl@vmware.com>,
       "Eric W. Biederman" <ebiederm@xmission.com>,
       Ingo Molnar <mingo@elte.hu>
Subject: Re: [patch] SMP alternatives
References: <437B5A83.8090808@suse.de> <438359D7.7090308@suse.de> <p7364qjjhqx.fsf@verdi.suse.de> <1132764133.7268.51.camel@localhost.localdomain> <20051123163906.GF20775@brahms.suse.de> <1132766489.7268.71.camel@localhost.localdomain> <Pine.LNX.4.64.0511230858180.13959@g5.osdl.org> <4384AECC.1030403@zytor.com> <Pine.LNX.4.64.0511231031350.13959@g5.osdl.org> <1132782245.13095.4.camel@localhost.localdomain> <20051123211353.GR20775@brahms.suse.de>
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	Content preview:  Andi Kleen wrote: > The idea was to turn LOCK on only
	if the process has any > shared writable mapping and num_online_cpus()
	> 0. Yep. Though I presume you mean "> 1". One hopes that
	num_online_cpus() never reaches zero during runtime ;-) [...] 
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Andi Kleen wrote:
> The idea was to turn LOCK on only if the process has any
> shared writable mapping and num_online_cpus() > 0.

Yep.  Though I presume you mean "> 1".

One hopes that num_online_cpus() never reaches zero during runtime ;-)

	Jeff