Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753172AbZIIM2J (ORCPT ); Wed, 9 Sep 2009 08:28:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752255AbZIIM2I (ORCPT ); Wed, 9 Sep 2009 08:28:08 -0400 Received: from bombadil.infradead.org ([18.85.46.34]:48642 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751582AbZIIM2I (ORCPT ); Wed, 9 Sep 2009 08:28:08 -0400 Date: Wed, 9 Sep 2009 08:28:06 -0400 From: Christoph Hellwig To: Wu Fengguang Cc: Chris Mason , Peter Zijlstra , Artem Bityutskiy , Jens Axboe , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, david@fromorbit.com, hch@infradead.org, akpm@linux-foundation.org, jack@suse.cz, "Theodore Ts'o" Subject: Re: [PATCH 8/8] vm: Add an tuning knob for vm.max_writeback_mb Message-ID: <20090909122805.GA30238@infradead.org> References: <1252401791-22463-1-git-send-email-jens.axboe@oracle.com> <1252401791-22463-9-git-send-email-jens.axboe@oracle.com> <4AA633FD.3080006@gmail.com> <1252425983.7746.120.camel@twins> <20090908162936.GA2975@think> <20090909092901.GA24185@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090909092901.GA24185@localhost> User-Agent: Mutt/1.5.19 (2009-01-05) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 697 Lines: 14 On Wed, Sep 09, 2009 at 05:29:01PM +0800, Wu Fengguang wrote: > It seems that balance_dirty_pages() is not coupled with MAX_WRITEBACK_PAGES. > Instead it uses the much smaller (ratelimit_pages + ratelimit_pages / 2). With Jen's writeback patches applied balance_dirty_pages does not start writeback itself anymore but calls bdi_start_writeback to let the flusher thread do it. it would be good if we do any writeback tuning ontop of these patches.. -- 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/