Messages in this thread | | | Subject | Re: [PATCH] powerpc: secondary CPUs signal to master before setting active and online (fixes kernel BUG at kernel/smpboot.c:134!) | From | Michael Ellerman <> | Date | Thu, 11 Dec 2014 10:06:29 +1100 |
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On Tue, 2014-12-09 at 12:54 -0800, Linus Torvalds wrote: > 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?
Yeah I'll put it in my tree unless Anton objects.
cheers
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