From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: [PATCH v2 01/16] FS: Added demand paging markers to filesystem Date: Wed, 9 May 2012 11:03:43 -0400 Message-ID: <20120509150343.GB14916@infradead.org> References: <1336054995-22988-1-git-send-email-svenkatr@ti.com> <20120509003348.GM5091@dastard> <201205091359.40554.arnd.bergmann@linaro.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <201205091359.40554.arnd.bergmann@linaro.org> Sender: linux-fsdevel-owner@vger.kernel.org To: Arnd Bergmann Cc: Dave Chinner , "S, Venkatraman" , linux-mmc@vger.kernel.org, cjb@laptop.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, linux-omap@vger.kernel.org, linux-kernel@vger.kernel.org, alex.lemberg@sandisk.com, ilan.smith@sandisk.com, lporzio@micron.com, rmk+kernel@arm.linux.org.uk List-Id: linux-omap@vger.kernel.org On Wed, May 09, 2012 at 01:59:40PM +0000, Arnd Bergmann wrote: > My feeling is that we should just treat every (REQ_SYNC | REQ_READ) > request the same and let them interrupt long-running writes, > independent of whether it's REQ_META or demand paging. It's funny that the CFQ scheduler used to boost metadata reads that have REQ_META set - in fact it still does for those filesystems using the now split out REQ_PRIO.