From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: [1/4] 2.6.23-rc6: known regressions Date: Thu, 13 Sep 2007 09:21:35 -0400 Message-ID: <46E9395F.2090300@rtr.ca> References: <46E81AC6.3000306@googlemail.com> <46E8A572.7050209@rtr.ca> <20070913093651.GA5077@suse.de> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20070913093651.GA5077@suse.de> Sender: linux-kernel-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Greg KH Cc: Alan Stern , Oliver Neukum , Michal Piotrowski , Linus Torvalds , Andrew Morton , LKML , Ingo Molnar , Markus , Jeff Chua , "Antonino A. Daplas" , linux-alpha@vger.kernel.org, Stefan Becker , Andi Kleen , Dave Jones , Len Brown , Pavel Machek , Thomas Gleixner , Jakub Jelinek , Jeff Dike , user-mode-linux-devel@lists.sourceforge.net, Adrian Bunk Greg KH wrote: > On Wed, Sep 12, 2007 at 10:50:26PM -0400, Mark Lord wrote: >> Michal Piotrowski wrote: >>> Hi all, >>> Here is a list of some known regressions in 2.6.23-rc6. >> ... >> >> Missing from the list: >> >> USB "autosuspend" feature (new in 2.6.23) breaks *lots* of devices. >> Many have since been blacklisted in one-at-a-time discovery patches, >> but that's really just the tip of the iceberg. >> >> This "feature" breaks a TON of user-visible things, >> mostly USB storage devices (USB drives/pens, digicams, etc..). >> >> The functionality is broken for just too much stuff, >> and needs to either be reverted or defaulted to "off" rather than "on". > > Ok, after conferring with Oliver this morning, I think the best solution > here is to both revert the usb-storage suspend patch as it has some > basic problems that can cause data loss, _and_ add the change to the > kernel that by default disables autosuspend on all USB devices except > hubs. Sounds like a sane approach. Hopefully the kinks can be worked out in time for a reattempt in 2.6.24. I understand how important this stuff is for battery powered devices, but it just doesn't appear to be ready yet. Cheers From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sc8-sf-mx1-b.sourceforge.net ([10.3.1.91] helo=mail.sourceforge.net) by sc8-sf-list1-new.sourceforge.net with esmtp (Exim 4.43) id 1IVodb-00060p-NF for user-mode-linux-devel@lists.sourceforge.net; Thu, 13 Sep 2007 06:21:43 -0700 Received: from rtr.ca ([76.10.145.34] helo=mail.rtr.ca) by mail.sourceforge.net with esmtp (Exim 4.44) id 1IVodW-0004bW-Ra for user-mode-linux-devel@lists.sourceforge.net; Thu, 13 Sep 2007 06:21:43 -0700 Message-ID: <46E9395F.2090300@rtr.ca> Date: Thu, 13 Sep 2007 09:21:35 -0400 From: Mark Lord MIME-Version: 1.0 References: <46E81AC6.3000306@googlemail.com> <46E8A572.7050209@rtr.ca> <20070913093651.GA5077@suse.de> In-Reply-To: <20070913093651.GA5077@suse.de> Subject: Re: [uml-devel] [1/4] 2.6.23-rc6: known regressions List-Id: The user-mode Linux development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: user-mode-linux-devel-bounces@lists.sourceforge.net Errors-To: user-mode-linux-devel-bounces@lists.sourceforge.net To: Greg KH Cc: Jakub Jelinek , Len Brown , Oliver Neukum , Adrian Bunk , Thomas Gleixner , Michal Piotrowski , Jeff Chua , Stefan Becker , LKML , Andi Kleen , Markus , Alan Stern , Pavel Machek , linux-alpha@vger.kernel.org, user-mode-linux-devel@lists.sourceforge.net, Dave Jones , Andrew Morton , Jeff Dike , Linus Torvalds , Ingo Molnar , "Antonino A. Daplas" Greg KH wrote: > On Wed, Sep 12, 2007 at 10:50:26PM -0400, Mark Lord wrote: >> Michal Piotrowski wrote: >>> Hi all, >>> Here is a list of some known regressions in 2.6.23-rc6. >> ... >> >> Missing from the list: >> >> USB "autosuspend" feature (new in 2.6.23) breaks *lots* of devices. >> Many have since been blacklisted in one-at-a-time discovery patches, >> but that's really just the tip of the iceberg. >> >> This "feature" breaks a TON of user-visible things, >> mostly USB storage devices (USB drives/pens, digicams, etc..). >> >> The functionality is broken for just too much stuff, >> and needs to either be reverted or defaulted to "off" rather than "on". > > Ok, after conferring with Oliver this morning, I think the best solution > here is to both revert the usb-storage suspend patch as it has some > basic problems that can cause data loss, _and_ add the change to the > kernel that by default disables autosuspend on all USB devices except > hubs. Sounds like a sane approach. Hopefully the kinks can be worked out in time for a reattempt in 2.6.24. I understand how important this stuff is for battery powered devices, but it just doesn't appear to be ready yet. Cheers ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ User-mode-linux-devel mailing list User-mode-linux-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/user-mode-linux-devel