From mboxrd@z Thu Jan 1 00:00:00 1970 From: Artur Paszkiewicz Subject: Re: [PATCH v2 0/6] a caching layer for raid5/6 Date: Tue, 19 May 2015 11:22:51 +0200 Message-ID: <555B00EB.9040303@intel.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-raid-owner@vger.kernel.org To: Shaohua Li , linux-raid@vger.kernel.org Cc: Kernel-team@fb.com, songliubraving@fb.com, hch@infradead.org, dan.j.williams@intel.com, neilb@suse.de List-Id: linux-raid.ids On 05/19/2015 04:57 AM, Shaohua Li wrote: > Hi, > > This is the second version of the raid5/6 caching layer patches. The patches add a > caching layer for raid5/6. The caching layer uses a SSD as a cache for a raid > 5/6. It works like the similar way of a hardware raid controller. The purpose > is to improve raid performance (reduce read-modify-write) and fix write hole > issue. The main patch is patch 3 and the description has all details about the > implementation. > > Main changes of V2 are to improve performance. Meta data write doesn't use FUA > any more. Discard request is only dispatched when discard range is big enough. > Also have some bug fixing and code cleanup. Please review! Hi, It seems patch 3 is missing. Artur