From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Date: Mon, 8 Jul 2019 18:19:12 +0200 Subject: [Cluster-devel] RFC: use the iomap writepage path in gfs2 In-Reply-To: <20190708000103.GH7689@dread.disaster.area> References: <20190701215439.19162-1-hch@lst.de> <20190708000103.GH7689@dread.disaster.area> Message-ID: <20190708161912.GA10233@lst.de> List-Id: To: cluster-devel.redhat.com MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Mon, Jul 08, 2019 at 10:01:03AM +1000, Dave Chinner wrote: > Ok, this doesn't look too bad from the iomap perspective, though it > does raise more questions. :) > > gfs2 now has two iopaths, right? One that uses bufferheads for > journalled data, and the other that uses iomap? That seems like it's > only a partial conversion - what needs to be done to iomap and gfs2 > to support the journalled data path so there's a single data IO > path? gfs2 always had to very different writeback I/O paths, including a copy and pasted versiom of write_cache_pages for journaled data, they just diverge a little bit more now. In the longer run I'd also like to add journaled data support to iomap for use with XFS, and then also switch gfs2 to it.