From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem Date: Thu, 10 Aug 2006 16:13:33 -0400 Message-ID: <44DB936D.2080909@garzik.org> References: <1155172622.3161.73.camel@localhost.localdomain> <20060809233914.35ab8792.akpm@osdl.org> <44DB8036.5020706@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Andrew Morton , linux-fsdevel@vger.kernel.org, ext2-devel@lists.sourceforge.net, cmm@us.ibm.com, linux-kernel@vger.kernel.org Return-path: To: Badari Pulavarty In-Reply-To: <44DB8036.5020706@us.ibm.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: ext2-devel-bounces@lists.sourceforge.net Errors-To: ext2-devel-bounces@lists.sourceforge.net List-Id: linux-fsdevel.vger.kernel.org Badari Pulavarty wrote: > Andrew Morton wrote: >> Also, JBD is presently feeding into submit_bh() buffer_heads which >> span two >> machine pages, and some device drivers spit the dummy. It'd be better to >> fix that once, rather than twice.. > Andrew, > > I looked at this few days ago. I am not sure how we end up having > multiple pages (especially, > why we end up having buffers with bh_size > pagesize) ? Do you know why ? > > Easiest fix would be to fix submit_bh() to deal with multiple vecs - > which is vetoed by > Jens and I agree with him :( Yep. The sooner we kill buffer heads and use submit_bio(), the better :) Jeff ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642