Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757738AbYHHVxV (ORCPT ); Fri, 8 Aug 2008 17:53:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752247AbYHHVxH (ORCPT ); Fri, 8 Aug 2008 17:53:07 -0400 Received: from netrider.rowland.org ([192.131.102.5]:3225 "HELO netrider.rowland.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1751874AbYHHVxF (ORCPT ); Fri, 8 Aug 2008 17:53:05 -0400 Date: Fri, 8 Aug 2008 17:53:04 -0400 (EDT) From: Alan Stern X-X-Sender: stern@netrider.rowland.org To: Jeff Garzik cc: linux-usb@vger.kernel.org, LKML Subject: Re: [2.6.27-rc] USB storage: hangs and massive dmesg spews In-Reply-To: <489CBC49.6050602@garzik.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1937 Lines: 48 On Fri, 8 Aug 2008, Jeff Garzik wrote: > Running kernel 2.6.27-rc1-00156-g94ad374 on x86-64, I > > 1) plugged in a USB device > > > Aug 8 15:32:03 core kernel: usb 1-8: new high speed USB device using ehci_hcd a > > nd address 4 > > Aug 8 15:32:04 core kernel: usb 1-8: configuration #1 chosen from 1 choice > > Aug 8 15:32:04 core kernel: usb 1-8: New USB device found, idVendor=041e, idPro > > duct=4155 > > Aug 8 15:32:04 core kernel: usb 1-8: New USB device strings: Mfr=1, Product=2, > > SerialNumber=3 > > Aug 8 15:32:04 core kernel: usb 1-8: Product: ZEN Stone Plus > > Aug 8 15:32:04 core kernel: usb 1-8: Manufacturer: CREATIVE > > Aug 8 15:32:04 core kernel: usb 1-8: SerialNumber: F03A09331004CD04 > > Aug 8 15:32:04 core kernel: Initializing USB Mass Storage driver... > [...] > > scsi 10:0:0:0: Direct-Access CREATIVE ZEN Stone Plus 1031 PQ: 0 ANSI: 4 > > sd 10:0:0:0: [sdc] 963968 2048-byte hardware sectors (1974 MB) > > sd 10:0:0:0: [sdc] Write Protect is off > > sd 10:0:0:0: [sdc] Mode Sense: 38 00 00 00 > > sd 10:0:0:0: [sdc] Assuming drive cache: write through > > > 2) I executed: sudo dd if=/dev/sdc of=foo.img bs=32k > > > 3) judging from ls(1), the entire storage device's contents was > successfully dumped to my hard drive. HOWEVER, dd(1) sat in disk wait, > failing to end execution once the end of the USB storage device was reached. > > > 4) a huge amount of dmesg spew followed. at the time of this writing, > the following spew has been passed to dmesg over TWO HUNDRED times: > > > Aug 8 15:41:01 core kernel: INFO: task usb-storage:21894 blocked for more than > > 120 seconds. This has been fixed in 2.6.27-rc2. Alan Stern -- 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/