From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262595AbVGMFuS (ORCPT ); Wed, 13 Jul 2005 01:50:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262578AbVGMFuR (ORCPT ); Wed, 13 Jul 2005 01:50:17 -0400 Received: from mx1.redhat.com ([66.187.233.31]:16867 "EHLO mx1.redhat.com") by vger.kernel.org with ESMTP id S262595AbVGMFuP (ORCPT ); Wed, 13 Jul 2005 01:50:15 -0400 Date: Tue, 12 Jul 2005 22:50:13 -0700 From: Pete Zaitcev To: Greg KH Cc: linux-kernel@vger.kernel.org Subject: Re: usb mass storage bug Message-Id: <20050712225013.2e66d0fc.zaitcev@redhat.com> In-Reply-To: References: <20050711203047.39437.qmail@web33113.mail.mud.yahoo.com> Organization: Red Hat, Inc. X-Mailer: Sylpheed version 2.0.0beta3 (GTK+ 2.6.7; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 11 Jul 2005 20:09:58 -0700, Greg KH wrote: > On Mon, Jul 11, 2005 at 01:30:47PM -0700, Joe Sevy wrote: > > Sorry, no logs or dmesg to report; just performance. > > Using kernel 2.6.12: USB flash drive (san-disk cruzer > > micro) Copy FROM drive is normal and quick; copy TO > > drive is amazingly slow. (30 minutes for 50K file). > > Used same configuration as for 2.6.11.11. Cured by > > going back to old kernel. > > Are you using CONFIG_UB or CONFIG_USB_STORAGE? Please, Greg. I knew that someone will try to implicate ub here, but you? Consider two things: #1 Joe's kernel reads and writes and sharply different speeds, while ub is uniformly slow #2 It's a regression in 2.6.12 -- Pete