Re: 3.1-rc1-git9: Reported regressions 2.6.39 -> 3.0

Rafael J. Wysocki
2011-08-15T17:42:19Z

On Monday, August 15, 2011, Paul E. McKenney wrote:
> 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 <stse+lkml@fsing.rootsland.net>
> > Date : 2011-07-25 12:51 (21 days old)
> > Message-ID : <20110725T141145.GA.2ae38.stse@fsing.rootsland.net>
> > 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 <davej@redhat.com>
> > Date : 2011-07-24 1:32 (22 days old)
> > Message-ID : <20110724013257.GA6777@redhat.com>
> > 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 <phil@kantaka.co.uk>
> > 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.

Thanks for the update!

Rafael