From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757817Ab2EIPDy (ORCPT ); Wed, 9 May 2012 11:03:54 -0400 Received: from 173-166-109-252-newengland.hfc.comcastbusiness.net ([173.166.109.252]:38655 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753457Ab2EIPDw (ORCPT ); Wed, 9 May 2012 11:03:52 -0400 Date: Wed, 9 May 2012 11:03:43 -0400 From: Christoph Hellwig 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 Subject: Re: [PATCH v2 01/16] FS: Added demand paging markers to filesystem 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 Content-Disposition: inline In-Reply-To: <201205091359.40554.arnd.bergmann@linaro.org> User-Agent: Mutt/1.5.21 (2010-09-15) 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 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.