On 05/21/2014 12:49 PM, Peter Zijlstra wrote: > On Wed, May 21, 2014 at 03:19:48PM +0200, Peter Zijlstra wrote: >> > On Wed, May 21, 2014 at 09:08:26AM -0400, Sasha Levin wrote: >>> > > +++ b/kernel/sched/core.c >>> > > @@ -1154,6 +1156,7 @@ int migrate_swap(struct task_struct *cur, struct >>> > > task_struct *p) >>> > > goto out; >>> > > >>> > > trace_sched_swap_numa(cur, arg.src_cpu, p, arg.dst_cpu); >>> > > + BUG_ON(cur == p); >>> > > ret = stop_two_cpus(arg.dst_cpu, arg.src_cpu, >>> > > migrate_swap_stop, &arg); >>> > > >>> > > out: >>> > > >>> > > >>> > > Which seems to get hit. This sounds like a race with task moving to >>> > > other cpu maybe? >> > >> > Oi, good call that, lemme go stare. > I think something simple like this should be sufficient to avoid the > problem of selecting oneself as a flip target.
Why would that happen in the first place? Thanks, Sasha -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
