From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ed Sutter Subject: imx6 emmc issue Date: Wed, 20 Nov 2013 11:06:02 -0500 Message-ID: <528CDDEA.1040500@alcatel-lucent.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from ihemail2.lucent.com ([135.245.0.35]:34033 "EHLO ihemail2.lucent.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754144Ab3KTQYM (ORCPT ); Wed, 20 Nov 2013 11:24:12 -0500 Received: from usnavsmail3.ndc.alcatel-lucent.com (usnavsmail3.ndc.alcatel-lucent.com [135.3.39.11]) by ihemail2.lucent.com (8.13.8/IER-o) with ESMTP id rAKG73n5018064 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=FAIL) for ; Wed, 20 Nov 2013 10:07:04 -0600 (CST) Received: from umail.lucent.com (umail.ndc.lucent.com [135.3.40.61]) by usnavsmail3.ndc.alcatel-lucent.com (8.14.3/8.14.3/GMO) with ESMTP id rAKG73aN027481 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Wed, 20 Nov 2013 10:07:03 -0600 Received: from [135.222.138.133] (Ed-PC.mh.lucent.com [135.222.138.133]) by umail.lucent.com (8.13.8/TPES) with ESMTP id rAKG72Jk010898 for ; Wed, 20 Nov 2013 10:07:03 -0600 (CST) Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: linux-mmc@vger.kernel.org Dong, Hello, I am currently working on an Freescale iMX6 SABRE Board platform http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=RDIMX6SABREBRD I'm trying to run with mainline kernel/uboot/buildroot just to be a bit more up-to-date than the LTIB distribution. I am trying to setup a ROOTFS directly on the eMMC device. Referring to this thread on the freescale forum: https://community.freescale.com/message/363870?et=watches.email.thread#363870 I'm working with linux-3.12 and patch-v3.12-next-20131119 and I've applied these additional patches: http://comments.gmane.org/gmane.linux.kernel.mmc/23339 I am able to access the emmc device from linux when using fdisk; however, when I attempt to run "mkfs.ext3 /dev/mmcblk0p1" the "Discarding device blocks" step takes over an hour (80 minutes last time I tried it). Fabio Estevam (from freescale) suggested I report this to you. Are you aware of this issue? Are you aware of anyone that's actually tried to do mkfs.ext3 on emmc with a recent kernel version for this board/SOC? Thanks in advance, Ed Sutter