Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753356Ab0KCHMT (ORCPT ); Wed, 3 Nov 2010 03:12:19 -0400 Received: from mail-wy0-f174.google.com ([74.125.82.174]:43881 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753186Ab0KCHMR (ORCPT ); Wed, 3 Nov 2010 03:12:17 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:from:to:cc:in-reply-to:references:content-type:date :message-id:mime-version:x-mailer:content-transfer-encoding; b=f5j9m5Ku1ra7fHQAJohHddFmDy/n3BJywIgOBw+F8CaJp4SWLc1NExooadY8G4HMUx b4RZr0YQAyM0gBUX4H+FKO1mLVhQCygMpqOyUhBZZX+ZBsx+TC5k/tE7akrGZdeABOOK q+tz2AmB+Yfa3UTEerj5Amvxqq1iVyfT6oLUU= Subject: Re: [RFC 4/4]x86: avoid tlbstate lock if no enough cpus From: Eric Dumazet To: Shaohua Li Cc: lkml , Ingo Molnar , Andi Kleen , "hpa@zytor.com" In-Reply-To: <1288767995.23014.120.camel@sli10-conroe> References: <1288766668.23014.117.camel@sli10-conroe> <1288767580.2467.636.camel@edumazet-laptop> <1288767995.23014.120.camel@sli10-conroe> Content-Type: text/plain; charset="UTF-8" Date: Wed, 03 Nov 2010 08:12:10 +0100 Message-ID: <1288768330.2467.660.camel@edumazet-laptop> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 646 Lines: 18 Le mercredi 03 novembre 2010 à 15:06 +0800, Shaohua Li a écrit : > just don't want to include the non-present cpus here. I wonder why we > haven't a variable to record online cpu number. What prevents a 256 cpus machine, to have 8 online cpus that all use the same TLB vector ? (Max 32 vectors, so 8 cpus share each vector, settled at boot time) Forget about 'online', and think 'possible' ;) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/