From: Christoph Hellwig Subject: Re: [Ocfs2-devel] [PATCH] ocfs2: Implement llseek() Date: Thu, 19 May 2011 13:05:31 +0200 Message-ID: <20110519110531.GB6357@lst.de> References: <1305773084-19296-1-git-send-email-sunil.mushran@oracle.com> <1305773084-19296-3-git-send-email-sunil.mushran@oracle.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: josef@redhat.com, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, viro@ZenIV.linux.org.uk, ocfs2-devel@oss.oracle.com To: Sunil Mushran Return-path: Received: from verein.lst.de ([213.95.11.211]:41525 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754718Ab1ESLFb (ORCPT ); Thu, 19 May 2011 07:05:31 -0400 Content-Disposition: inline In-Reply-To: <1305773084-19296-3-git-send-email-sunil.mushran@oracle.com> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Wed, May 18, 2011 at 07:44:44PM -0700, Sunil Mushran wrote: > Unwritten (preallocated) extents are considered holes because the file system > treats reads to such regions in the same way as it does to holes. How does this work for the case of an unwrittent extent that has been written to in the pagecache but not converted yet? Y'know the big data corruption and flamewar that started all this?