Messages in this thread | | | Date | Tue, 9 Dec 2014 12:54:43 -0800 | Subject | Re: [PATCH] powerpc: secondary CPUs signal to master before setting active and online (fixes kernel BUG at kernel/smpboot.c:134!) | From | Linus Torvalds <> |
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On Mon, Dec 8, 2014 at 3:58 PM, Anton Blanchard <anton@samba.org> wrote: > Hi Ingo, > >> At that point I thought the previous task_cpu() was somewhat ingrained >> in the scheduler and came up with the patch. If not, we could go on a >> hunt to see what else needs fixing. > > I had another look. The scheduled does indeed make assumptions about the > previous task_cpu, but we have a hammer to fix it up called > select_fallback_rq. > > I annotated select_fallback_rq, and did hit a case where the CPU was > not active. ppc64 patch below.
Anton, I'll assume I will get this through the usual powerpc pull requests?
> I think x86 have a similar (although harder to hit) issue.
Ingo?
Linus
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