From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex Tomas Subject: Re: [PATCH 1/5] Forking ext4 filesystem from ext3 filesystem Date: Fri, 11 Aug 2006 01:11:23 +0400 Message-ID: References: <1155172622.3161.73.camel@localhost.localdomain> <20060809233914.35ab8792.akpm@osdl.org> <44DB8036.5020706@us.ibm.com> <44DB936D.2080909@garzik.org> <20060810132720.4d9fced4.akpm@osdl.org> <44DB9E6C.9070808@garzik.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: Andrew Morton , ext2-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Badari Pulavarty , linux-fsdevel@vger.kernel.org, cmm@us.ibm.com Return-path: To: Jeff Garzik In-Reply-To: <44DB9E6C.9070808@garzik.org> (Jeff Garzik's message of "Thu, 10 Aug 2006 17:00:28 -0400") 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 >>>>> Jeff Garzik (JG) writes: >> A buffer_head is the kernel's sole abstraction of a disk block. >> Filesystems use disk blocks a lot, and they need such an abstraction. JG> IMO Al Viro work has shown that you can do pagecache I/O without needing JG> such a heavyweight system. in delayed allocation patch for ext3 (ontop of extents) we do use bio's for data. thanks, Alex ------------------------------------------------------------------------- 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