Messages in this thread Patch in this message | | | Date | Wed, 16 Jul 2014 09:55:46 -0500 | From | Bruno Wolff III <> | Subject | Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c |
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caffcdd8d27ba78730d5540396ce72ad022aff2c has been causing crashes early in the boot process on one of three machines I have been testing the kernel on. On that one machine it happens every boot. It happens before netconsole is functional.
A partial revert of the commit fixes the problem. I do not know why the commit is broken though.
I have filed https://bugzilla.kernel.org/show_bug.cgi?id=80251 for this issue.
The problem happens on both Fedora and Linus kernels.
git diff caffcdd8d27ba78730d5540396ce72ad022aff2c^ caffcdd8d27ba78730d5540396ce72ad022aff2c diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 45d077ed24fb..6340c601475d 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -5794,8 +5794,6 @@ build_sched_groups(struct sched_domain *sd, int cpu) continue; group = get_group(i, sdd, &sg); - cpumask_clear(sched_group_cpus(sg)); - sg->sgp->power = 0; cpumask_setall(sched_group_mask(sg)); for_each_cpu(j, span) { By rc5 the second line can't be added back because the structure has changed. However adding back cpumask_clear(sched_group_cpus(sg)); to rc5 got things working for me again.
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