On Wed, 6 Jul 2016 15:43:51 +0200
Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote:
> On 07/06/2016 03:32 PM, Steven Rostedt wrote:
> > On Wed, 6 Jul 2016 07:03:43 -0500
> > Corey Minyard <cminyard@xxxxxxxxxx> wrote:
> >
> >>> ---
> >>> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
> >>> index aaf4b9b94f38..cc70d98a30f6 100644
> >>> --- a/arch/x86/kernel/cpu/mcheck/mce.c
> >>> +++ b/arch/x86/kernel/cpu/mcheck/mce.c
> >>> @@ -1391,7 +1391,8 @@ static int mce_notify_work_init(void)
> >>>
> >>> static void mce_notify_work(void)
> >>> {
> >>> - wake_up_process(mce_notify_helper);
> >>> + if (mce_notify_helper)
> >>> + wake_up_process(mce_notify_helper);
> >>> }
> >
> > Actually, this appears to be the fix in 4.6-rt.
>
> This is in there since it was switched to swork instead of using its
> own thread and is also in v4.1:
>
> https://git.kernel.org/cgit/linux/kernel/git/rt/linux-rt-devel.git/tree/arch/x86/kernel/cpu/mcheck/mce.c?h=linux-4.1.y-rt#n1387
>
> as part of x86-mce-use-swait-queue-for-mce-wakeups.patch. And this
> patch was first part of v3.18.9-rt4 as a new patch dropping x86-mce-
> Defer-mce-wakeups-to-threads-for-PREEMPT_RT.patch.
>
I'm doing backports now. I'm currently on 4.1, but trying to move
quickly.
Corey, what commits did you backport (plus the one Boris showed)? And
does that fix your issue?
-- Steve
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