Messages in this thread | | | Date | Tue, 22 Jul 2014 21:21:40 -0700 | Subject | Re: Random panic in load_balance() with 3.16-rc | From | Linus Torvalds <> |
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On Tue, Jul 22, 2014 at 8:53 PM, Michel Dänzer <michel@daenzer.net> wrote: > > Just happened again with the same change on top of 3.16-rc6.
The (maybe) related bugzilla entry is just odd. Bruno Wolff reports that the BUG_ON() in his added patch triggers:
+ cpumask_clear(sched_group_cpus(sg)); + sg->sgc->capacity = 0; + BUG_ON(!cpumask_empty(sched_group_cpus(sg)));
where it *just* did a cpumask_clear(), and now the BUG_ON() triggers that it's no longer empty?
That would imply an allocation error, but all the sched groups seem to be properly allocated with the proper addition of cpumask_size().
And his config file even has NR_CPUS being 32, so it should be a single word of bitmap, which triggers all the simple code.
Completely insane, in other words.
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