From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from web15805.mail.cnb.yahoo.com (web15805.mail.cnb.yahoo.com [202.165.102.85]) by ozlabs.org (Postfix) with SMTP id 6456768910 for ; Thu, 29 Dec 2005 23:54:07 +1100 (EST) Message-ID: <20051229125405.18967.qmail@web15805.mail.cnb.yahoo.com> Date: Thu, 29 Dec 2005 20:54:05 +0800 (CST) From: Sam Song To: linuxppc-embedded list In-Reply-To: <20051229043720.15530.qmail@web15809.mail.cnb.yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=gb2312 Subject: Re : MPC8347 USB problem : Copying big file[>150MB] discontinuous via Samba List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sam Song wrote: > Hi all, > > We met a USB performance problem on a custom > 8347board with 2.4.31. When copying small > files no more than 100MB in size, it worked > smoothly with NEC or VIA PCI card. But > copying a big file like more than 150MB > in size would decrease the copying > speed a lot. Serial console even couldn't > response 'ls' command. The target has a > 128MB DDR RAM. Ummm, actually, 256MB DDR RAM. > While the same driver with 2.4.31 worked fine > on a 8248 custom board. What could the > problem be? Arhhhh, it was due to USB 1.1 limitation itself(8347 USB 2.0 driver wasn't added yet when I posted it). Only on the workable 8248 target with USB 1.1 driver, it would have such a phenomena. There was even a network error displayed. If working with USB 2.0, no any problem. New to me:-) But Well, I don't have the guts to say this is a kernel's bug:-) > Sorry to distrub you during Christmas Time. OK, stay on relax, pls. Best regards, Sam __________________________________________________ ¸Ï¿ì×¢²áÑÅ»¢³¬´óÈÝÁ¿Ãâ·ÑÓÊÏä? http://cn.mail.yahoo.com