From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1b3HxP-0003J3-0K for barebox@lists.infradead.org; Thu, 19 May 2016 07:01:19 +0000 Date: Thu, 19 May 2016 09:00:56 +0200 From: Sascha Hauer Message-ID: <20160519070056.GC11148@pengutronix.de> References: <1462861483-19983-1-git-send-email-s.hauer@pengutronix.de> <1462861483-19983-4-git-send-email-s.hauer@pengutronix.de> <20160518065216.GA2362@lws-christ> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20160518065216.GA2362@lws-christ> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: Re: [PATCH 4/4] mtd: nand: nand_mxs: Add subpage read support To: Stefan Christ Cc: Barebox List On Wed, May 18, 2016 at 08:52:16AM +0200, Stefan Christ wrote: > Hi Sascha, > > On Tue, May 10, 2016 at 08:24:43AM +0200, Sascha Hauer wrote: > > subpage read support can significantly speed up scanning UBI volumes, so > > add support for it. This is inspired by the corresponding Kernel commit. > > Unlike in the kernel we add subpage read support for i.MX28 aswell. > > Testing it on i.MX28 revealed no problems. > > > > Signed-off-by: Sascha Hauer > > Here is my > > Tested-by: Stefan Christ > > I measured the ubiattach time for two different NAND chips after an ubiformat > on the devices. It's around 30% faster. Here are the results: Thanks for testing this. The results become even better with bigger pages. I have a board with 8k page Nand here. The scanning time reduced from 31s to 3.5s. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox