Hi Paul, Is this known? Rafael On Friday, May 17, 2013 10:49:16 PM Arend van Spriel wrote: > On 05/14/2013 10:38 PM, Arend van Spriel wrote: > > On 05/14/2013 10:34 PM, Rafael J. Wysocki wrote: > >> On Tuesday, May 14, 2013 03:03:58 PM Arend van Spriel wrote: > >>> Laptop hangs pretty soon after booting. Workaround for me was to turn > >>> off ACPI on kernel command line, ie. acpi=off > >>> > >>> Attached is my kernel configuration. > >> > >> Well, I have no idea what may be the source of this. > > > > Me neither. > > > >> Any chance to bisect? > > > > can try. Rebuilding kernels can be a drag :-p > > > > Regards, > > Arend > > Hi Rafael, > > The bisect result found commit c0f4dfd4f as culprit. I also verified > that the merge into Linus' tree introduced the issue upstream, ie. > 6c24499 works and 1f889ec does not. I tried to revert the commit, but > that was a bit risky (conflict to resolve) and did not give me a stable > kernel. The only thing that works is selecting acpi=off. I tried also > nohz=off but that resulted in /init failure. > > Regards, > Arend > > ---8<---------------------------------------------------------------- > > commit 1f889ec62c3f0d8913f3c32f9aff2a1e15099346 > Merge: 6c24499 8fcfae3 > > commit 8fcfae31719c0a6c03f2cf63f815b46d378d8be4 > Merge: d02a9a8 6d87669 > > commit 6d87669357936bffa1e8fea7a4e7743e76905736 > Merge: 3f944ad 81e5949 910ee45 > > commit c0f4dfd4f90f1667d234d21f15153ea09a2eaa66 > Author: Paul E. McKenney <paul.mckenney@xxxxxxxxxx> > Date: Fri Dec 28 11:30:36 2012 -0800 > > rcu: Make RCU_FAST_NO_HZ take advantage of numbered callbacks > > Because RCU callbacks are now associated with the number > of the grace period that they must wait for, CPUs can now > take advance callbacks corresponding to grace periods that > ended while a given CPU was in dyntick-idle mode. This > eliminates the need to try forcing the RCU state machine > while entering idle, thus reducing the CPU intensiveness > of RCU_FAST_NO_HZ, which should increase its energy > efficiency. > > Signed-off-by: Paul E. McKenney <paul.mckenney@xxxxxxxxxx> > Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxxxxxxxxxx> > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > Please read the FAQ at http://www.tux.org/lkml/ > > > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
