Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758950AbXENGsj (ORCPT ); Mon, 14 May 2007 02:48:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754200AbXENGsd (ORCPT ); Mon, 14 May 2007 02:48:33 -0400 Received: from www.osadl.org ([213.239.205.134]:47860 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754096AbXENGsc (ORCPT ); Mon, 14 May 2007 02:48:32 -0400 Subject: Re: [patch 4/4] powerpc 2.6.21-rt1: reduce scheduling latency by changing tlb flush size From: Thomas Gleixner Reply-To: tglx@linutronix.de To: Tsutomu OWA Cc: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org, mingo@elte.hu In-Reply-To: References: Content-Type: text/plain Date: Mon, 14 May 2007 08:51:46 +0200 Message-Id: <1179125506.22481.297.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 788 Lines: 22 Tsutomu-san, On Mon, 2007-05-14 at 15:38 +0900, Tsutomu OWA wrote: > Oopps, Subject was wrong.... resending it. Sorry. > > To reduce scheduling latecy by changing tlb flush size to 1. > Since tlb flush on Celleb is done by calling (an) expensive hypervisor call(s), > it takes a long time to flush tlbs and causes scheduing latency. > > As I don't know how long it takes on other platforms, it would be better to > enclose it within #ifdef CONFIG_PPC_CELLEB. Yes, that might be appropriate. Can you add this and resend please ? tglx - 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/