From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by wa-out-1112.google.com with SMTP id m33so1638409wag.8 for ; Fri, 18 Jan 2008 02:31:30 -0800 (PST) Message-ID: <4df4ef0c0801180231j46391b2byc38be709b3cbf2c8@mail.gmail.com> Date: Fri, 18 Jan 2008 13:31:29 +0300 From: "Anton Salikhmetov" Subject: Re: [PATCH -v6 0/2] Fixing the issue with memory-mapped file times 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: owner-linux-mm@kvack.org Return-Path: To: Miklos Szeredi 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 List-ID: 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org