Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964943AbVL2Ash (ORCPT ); Wed, 28 Dec 2005 19:48:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S964950AbVL2Ash (ORCPT ); Wed, 28 Dec 2005 19:48:37 -0500 Received: from mustang.oldcity.dca.net ([216.158.38.3]:38613 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S964943AbVL2Asg (ORCPT ); Wed, 28 Dec 2005 19:48:36 -0500 Subject: Re: 2.6.15-rc5: latency regression vs 2.6.14 in exit_mmap->free_pgtables From: Lee Revell To: Hugh Dickins Cc: linux-kernel , Ingo Molnar , Linus Torvalds In-Reply-To: References: <1135726300.22744.25.camel@mindpipe> Content-Type: text/plain Date: Wed, 28 Dec 2005 19:54:15 -0500 Message-Id: <1135817656.4645.3.camel@mindpipe> Mime-Version: 1.0 X-Mailer: Evolution 2.4.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 959 Lines: 22 On Wed, 2005-12-28 at 22:59 +0000, Hugh Dickins wrote: > Here's an untested patch which should mostly correct your latency > problem with 2.6.15-rc. But it's certainly not the right solution, > and it's probably both too ugly and too late for 2.6.15. If you > really want Linus to put it in, please test it out, especially on > ia64, and try to persuade him. Personally I'd prefer to wait for > the right solution: but I don't have your low-latency needs, and > I'm certainly guilty of a regression here. OK, FWIW the patch does work. It occurred to me that this might only be a noticeable latency regression on slower machines. Although too late for 2.6.15 it would be nice to have fixed for 2.6.16... Lee - 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/