Re: 2.6.24-git2: Oracle 11g VKTM process enters R state on startup and is unkillable [still broken in 2.6.25-rc1]

[Alessandro Suardi]

On Feb 12, 2008 12:12 AM, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
> On Monday, 11 of February 2008, Ingo Molnar wrote:
> >
> > * Ingo Molnar <mingo@xxxxxxx> wrote:
> >
> > > no, they were not lost, they just didnt pass QA here (they crashed on
> > > a particularly hard to debug 8-way box i have) and Peter worked on
> > > that queue of fixes up until today to get it really correct. Could you
> > > check:
> > >
> > >    git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched.git
> > >
> > > combo patch below as well - whichever you prefer. The shortlog can be
> > > found below as well - but i dont yet consider this pullable, i'd like
> > > it to see pass a full night of randconfig tests on my test-systems.
> >
> > ok, we just found the reason for the 8-way crash, the delta fix from
> > Peter is below if any of you have tried the previous combo patch.
> > Updated sched.git as well, new HEAD is
> > fec13e45305d69fd0bd23b30bd05a0a42cf341f8.
>
> With the previous patch and this patch applied, the issue is not reproducible
> here.
>
> Thanks,
> Rafael

The problem is fixed for me as well with the previous patch + the patch
 below, VKTM now enters S state and Oracle shuts down properly again.

Thanks !

> > Index: linux-2.6/kernel/sched.c
> > ===================================================================
> > --- linux-2.6.orig/kernel/sched.c
> > +++ linux-2.6/kernel/sched.c
> > @@ -219,6 +219,10 @@ static void start_rt_bandwidth(struct rt
> >       if (rt_b->rt_runtime == RUNTIME_INF)
> >               return;
> >
> > +     if (hrtimer_active(&rt_b->rt_period_timer))
> > +             return;
> > +
> > +     spin_lock(&rt_b->rt_runtime_lock);
> >       for (;;) {
> >               if (hrtimer_active(&rt_b->rt_period_timer))
> >                       break;
> > @@ -229,6 +233,7 @@ static void start_rt_bandwidth(struct rt
> >                             rt_b->rt_period_timer.expires,
> >                             HRTIMER_MODE_ABS);
> >       }
> > +     spin_unlock(&rt_b->rt_runtime_lock);
> >  }
> >
> >  #ifdef CONFIG_RT_GROUP_SCHED

--alessandro

 "We act as though comfort and luxury were the chief requirements
   of life, when all that we need to make us really happy is
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   (Charles Kingsley)
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