From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ea0-f181.google.com (mail-ea0-f181.google.com [209.85.215.181]) by yocto-www.yoctoproject.org (Postfix) with ESMTP id 2DCE2E01775 for ; Wed, 30 Oct 2013 12:21:49 -0700 (PDT) Received: by mail-ea0-f181.google.com with SMTP id d10so885756eaj.26 for ; Wed, 30 Oct 2013 12:21:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:from:content-type:message-id:date:to :content-transfer-encoding:mime-version; bh=tPvJMgguST3vULqwihYGYroHwImp/2PertMEqVWIXQA=; b=p4VMhIrNPBN5FVwKtq54bo3ki4W8/Y3nj2QEC547eeP6qV9sHQOHCHcz+wAZ9eaA7X d8snWCRlWAixLcE36L+Sxi5zkd+C7hzoRD5upz1JkbB9PwD58xvJBSZ2wEu0sBbwH6Hc qZc+ZCJPAYBr9dhvrfTfmngUsr/eePCLkGBjdfi6i6jGLYZYc1nZKewvjE6up4L3+xDU yckvSRjvL5TXrFRL4gxvtSA7Bqe+r5Hf8jITdrAKUoOK0FAwniTeFLGJpx8QyHDeW211 E3mGrOT2TbvdYHpJUb53CIkuvMbzm2H5GUP0G3JOzl4XGv0sd3fRA2eITK6qLb52oAnm mrrw== X-Received: by 10.14.108.9 with SMTP id p9mr6837428eeg.8.1383160908354; Wed, 30 Oct 2013 12:21:48 -0700 (PDT) Received: from [10.14.181.39] (adsl-ull-60-68.46-151.net24.it. [151.46.68.60]) by mx.google.com with ESMTPSA id d7sm87003613eem.8.2013.10.30.12.21.41 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 30 Oct 2013 12:21:47 -0700 (PDT) From: Simone X-Mailer: iPad Mail (11A501) Message-Id: <1DD68773-7567-4AD2-ADE9-9130ECFAD8EB@gmail.com> Date: Wed, 30 Oct 2013 20:21:39 +0100 To: "" Mime-Version: 1.0 (1.0) Subject: Imx53 sd card read write timing X-BeenThere: meta-freescale@yoctoproject.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Usage and development list for the meta-fsl-* layers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Oct 2013 19:21:52 -0000 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Dear all, I've finished today to port our changes from the old FSL kernel we used (201= 1 version, v11.05) for our board based on imx53qsb. Everything is working fine now, using the FSL kernel from Master branch, exc= ept one thing. Compared to the previous (very old) version of the kernel, we noted that the= uSD card read/write timings are a lot more slower than before (also the sys= tem kernel loading, seems two times than before) Now i really don't know where to point my finger first. Maybe something inserted in the sdhc driver? Or the journaled filesystem? Really i don't know. Does someone have faced a similar problem in the past? Thank you so much My best regards Simone