Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756719Ab2BGIkG (ORCPT ); Tue, 7 Feb 2012 03:40:06 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:29220 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754411Ab2BGIkE (ORCPT ); Tue, 7 Feb 2012 03:40:04 -0500 X-AuditID: cbfee61b-b7be3ae0000039aa-39-4f30e361046c From: Seungwon Jeon To: "'Chris Ball'" Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, "'Namjae Jeon'" References: <000901ccdc09$92daf020$b890d060$%jun@samsung.com> In-reply-to: Subject: RE: [PATCH v4 0/2] mmc: core: Support packed command feature of eMMC4.5 Date: Tue, 07 Feb 2012 17:40:00 +0900 Message-id: <001201cce574$14b7d220$3e277660$%jun@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=ks_c_5601-1987 Content-transfer-encoding: 7bit X-Mailer: Microsoft Office Outlook 12.0 Thread-index: AczjnPpDGYfz9m0lQEuGttJ70Ek+/gBjXLnA Content-language: ko X-Brightmail-Tracker: AAAAAA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1301 Lines: 37 Hi Chris, Chris Ball wrote: > Hi Seungwon, > > On Thu, Jan 26 2012, Seungwon Jeon wrote: > > This patch-set adds support of packed command feature > > for eMMC4.5 devices. > > Thanks, looks good! Were you or Namjae able to measure any performance > changes with this patchset applied? We could get the difference results depending on eMMC device. I have tested patch set with eMMC device which was not optimized in packed command. In my environment there is a performance gain only with packed write if total chunk size for transfer is large. This is not common case in user scenario as of now. Currently this patch set with regard to packed command is meaningful and helpful for device supporting fully. Best regards, Seungwon Jeon. > > - Chris. > -- > Chris Ball > One Laptop Per Child > -- > To unsubscribe from this list: send the line "unsubscribe linux-mmc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/