Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760267AbYARKbl (ORCPT ); Fri, 18 Jan 2008 05:31:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1760088AbYARKbc (ORCPT ); Fri, 18 Jan 2008 05:31:32 -0500 Received: from wa-out-1112.google.com ([209.85.146.183]:25723 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760050AbYARKba (ORCPT ); Fri, 18 Jan 2008 05:31:30 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=MmbC3Rg6EtdJ4A0cau8MNjWy5uHw8Y1XRAd3WMhZe9fOqW6GPWvQK9I51m31UQU+Kw7kLF0GcMIPG+JbisfFxrPYk4Ne+VECfIn0ttlL+6UkBy2eQvISeFQKZjwpZFx3wO8IzPmYGPWUbgpDeaoLUpeR8hNsDCN8LiwLJ8pasbc= Message-ID: <4df4ef0c0801180231j46391b2byc38be709b3cbf2c8@mail.gmail.com> Date: Fri, 18 Jan 2008 13:31:29 +0300 From: "Anton Salikhmetov" To: "Miklos Szeredi" Subject: Re: [PATCH -v6 0/2] Fixing the issue with memory-mapped file times Cc: linux-mm@kvack.org, jakob@unthought.net, linux-kernel@vger.kernel.org, valdis.kletnieks@vt.edu, riel@redhat.com, ksm@42.dk, staubach@redhat.com, jesper.juhl@gmail.com, torvalds@linux-foundation.org, a.p.zijlstra@chello.nl, akpm@linux-foundation.org, protasnb@gmail.com, r.e.wolff@bitwizard.nl, hidave.darkstar@gmail.com, hch@infradead.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <12006091182260-git-send-email-salikhmetov@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 929 Lines: 28 2008/1/18, Miklos Szeredi : > > 4. Performance test was done using the program available from the > > following link: > > > > http://bugzilla.kernel.org/attachment.cgi?id=14493 > > > > Result: the impact of the changes was negligible for files of a few > > hundred megabytes. > > Could you also test with ext4 and post some numbers? Afaik, ext4 uses > nanosecond timestamps, so the time updating code would be exercised > more during the page faults. > > What about performance impact on msync(MS_ASYNC)? Could you please do > some measurment of that as well? I'll do the measurements for the MS_ASYNC case and for the Ext4 filesystem. > > Thanks, > Miklos > > -- 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/