From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: Re: 3.1-rc1-git9: Reported regressions 2.6.39 -> 3.0 Date: Mon, 15 Aug 2011 08:37:59 -0700 Message-ID: <20110815153759.GF2389@linux.vnet.ibm.com> References: Reply-To: paulmck-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: Sender: kernel-testers-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "Rafael J. Wysocki" Cc: Linux Kernel Mailing List , Maciej Rutecki , Florian Mickler , Andrew Morton , Linus Torvalds , Kernel Testers List , Network Development , Linux ACPI , Linux PM List , Linux SCSI List , Linux Wireless List , DRI On Sun, Aug 14, 2011 at 09:02:27PM +0200, Rafael J. Wysocki wrote: > [NOTE: > We already have a bug entry for tracking regressions from 3.0: > > http://bugzilla.kernel.org/show_bug.cgi?id=40982 > > but there are no reports linked to it, mostly because Maciej is on vacation, > but also because the frequency of reporting regressions has been low > recently. So, if you're seeing a regression from 3.0, please let us know.] > > This message contains a list of some post-2.6.39 regressions introduced before > 3.0, for which there are no fixes in the mainline known to the tracking team. > If any of them have been fixed already, please let us know. > > If you know of any other unresolved post-2.6.39 regressions, please let us know > either and we'll add them to the list. Also, please let us know if any > of the entries below are invalid. > > Each entry from the list will be sent additionally in an automatic reply to > this message with CCs to the people involved in reporting and handling the > issue. > > > Listed regressions statistics: > > Date Total Pending Unresolved > ---------------------------------------- > 2011-08-14 63 22 19 > > > Unresolved regressions > ---------------------- > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=40282 > Subject : IP forwarding regression since 3.0-rc6 > Submitter : Stephan Seitz > Date : 2011-07-25 12:51 (21 days old) > Message-ID : <20110725T141145.GA.2ae38.stse-S0d6l+6kcjrOGKtSYHEJQ9HuzzzSOjJt@public.gmane.org> > References : http://marc.info/?l=linux-kernel&m=131159880004908&w=2 > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=40172 > Subject : lockdep trace from post 3.0. > Submitter : Dave Jones > Date : 2011-07-24 1:32 (22 days old) > Message-ID : <20110724013257.GA6777-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> > References : http://marc.info/?l=linux-kernel&m=131147120206819&w=2 > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=40092 > Subject : RCU stall in linux-3.0.0 > Submitter : Philip Armstrong > Date : 2011-07-25 21:44 (21 days old) This one was due the the CPU's idea of the current time getting way out of sync (as in more than a minute's worth of disagreement, which is pretty impressive when you think about it). So what happened is that one CPU decided that the current grace period was a full minute old immediately, and thus started screaming piteously. John Stultz provided a configuration workaround, and he and Thomas Gleixner would be working out the long-term fix. Thanx, Paul