From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mike Snitzer Subject: Re: an optimization for dm-bufio and dm-integrity Date: Wed, 19 Jul 2017 14:56:06 -0400 Message-ID: <20170719185606.GB20480@redhat.com> References: <20170719153954.GA61594@redhat.com> <25f78733-a371-068f-9465-830e65027940@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <25f78733-a371-068f-9465-830e65027940@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Milan Broz Cc: dm-devel@redhat.com, Mikulas Patocka List-Id: dm-devel.ids On Wed, Jul 19 2017 at 12:22pm -0400, Milan Broz wrote: > On 07/19/2017 05:39 PM, Mike Snitzer wrote: > > On Wed, Jul 19 2017 at 11:30P -0400, > > Mikulas Patocka wrote: > > > >> Hi Mike > >> > >> Some times ago, I sent this patch as dm-bufio optimization (it doesn't > >> have to write full buffers, it only writes a part of the buffer that > >> changed). You delayed the patch until the next kernel. > >> > >> Will you submit the patch to the current kernel? > > > > Sorry about that. It obviously fell off my radar. > > > > I'll review it and see if I can make the justification for it going into > > 4.13-rc2. But unfortunately the 4.13 merge window closed this past > > Sunday when Linus released v4.13-rc1 > > > > I'll let you know though, thanks. > > Just FYI: I am just running some tests with the stack space fix and > this patch and the performance improvement for 4k sectors is really big > (compared to 4.12). If you could quantify the performance improvement that would be helpful. Are you also using the plugging patch?