From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail172.messagelabs.com (mail172.messagelabs.com [216.82.254.3]) by kanga.kvack.org (Postfix) with ESMTP id 5C3346B004D for ; Fri, 26 Jun 2009 01:02:45 -0400 (EDT) Date: Fri, 26 Jun 2009 07:02:45 +0200 From: Jens Axboe Subject: Re: [RFC][PATCH] mm: stop balance_dirty_pages doing too much work Message-ID: <20090626050245.GL31415@kernel.dk> References: <1245839904.3210.85.camel@localhost.localdomain> <200906251646.22785.a1426z@gawab.com> <20090625144450.GT31415@kernel.dk> <200906252010.33535.a1426z@gawab.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200906252010.33535.a1426z@gawab.com> Sender: owner-linux-mm@kvack.org To: Al Boldi Cc: Peter Zijlstra , Andrew Morton , Richard Kennedy , linux-mm@kvack.org, linux-kernel@vger.kernel.org List-ID: On Thu, Jun 25 2009, Al Boldi wrote: > Jens Axboe wrote: > > The test case is random mmap writes to files that have been laid out > > sequentially. So it's all seeks. The target drive is an SSD disk though, > > so it doesn't matter a whole lot (it's a good SSD). > > Oh, SSD. What numbers do you get for normal disks? I haven't run this particular test on rotating storage. The type of drive should not matter a lot, I'm mostly interested in comparing vanilla and the writeback patches on identical workloads and storage. -- Jens Axboe -- 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