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    SubjectRe: 2.6.24-git2: Oracle 11g VKTM process enters R state on startup and is unkillable [still broken in 2.6.25-rc1]
    Date
    On Monday, 11 of February 2008, Ingo Molnar wrote:
    >
    > * Ingo Molnar <mingo@elte.hu> 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


    > 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
    >
    >


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