From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shaohua Li Subject: [RFC 0/2] raid5 trim support Date: Tue, 17 Apr 2012 16:35:52 +0800 Message-ID: <20120417083552.483324288@kernel.org> Return-path: Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org Cc: neilb@suse.de, dan.j.williams@intel.com, axboe@kernel.dk List-Id: linux-raid.ids These are the raid5 trim support patches I'm working on. There are some limitations to support raid5 trim. I explained the details in the first patch. The raid5 state machine is quite complicated and I'm sure I missed something, so it's a RFC so far. And the raid5 trim suffers from the same discard request merge issue as raid0/10. If you try these in a SSD, please ignore the warning from block layer. But anyway, my raid4/5/6 tests work well with a fusionio card. Comments and suggestions are welcome! Thanks, Shaohua