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Remove the hack to clear the owepreempt flag after running a fast

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interrupt handler from Alpha.  Instead, expand the scheduler pinning
in the interrupt handling code so that curthread is pinned while executing
fast interrupt handlers.

MFC after:	1 week
This commit is contained in:
John Baldwin 2005-09-29 19:12:44 +00:00
parent d1754a9b9c
commit 1c5b402897
1 changed files with 16 additions and 17 deletions
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33
sys/alpha/alpha/interrupt.c
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@ -426,6 +426,13 @@ alpha_dispatch_intr(void *frame, unsigned long vector)
atomic_add_long(i->cntp, 1);
/*
* It seems that we need to return from an interrupt back to PAL
* on the same CPU that received the interrupt, so pin the interrupted
* thread to the current CPU until we return from the interrupt.
*/
sched_pin();
/*
* Handle a fast interrupt if there is no actual thread for this
* interrupt by calling the handler directly without Giant. Note
@ -435,26 +442,18 @@ alpha_dispatch_intr(void *frame, unsigned long vector)
if ((ih->ih_flags & IH_FAST) != 0) {
critical_enter();
ih->ih_handler(ih->ih_argument);
/* XXX */
curthread->td_owepreempt = 0;
critical_exit();
return;
}
} else {
if (ithd->it_disable) {
CTR1(KTR_INTR,
"alpha_dispatch_intr: disabling vector 0x%x",
i->vector);
ithd->it_disable(ithd->it_vector);
}
if (ithd->it_disable) {
CTR1(KTR_INTR,
"alpha_dispatch_intr: disabling vector 0x%x", i->vector);
ithd->it_disable(ithd->it_vector);
error = ithread_schedule(ithd);
KASSERT(error == 0, ("got an impossible stray interrupt"));
}
/*
* It seems that we need to return from an interrupt back to PAL
* on the same CPU that received the interrupt, so pin the interrupted
* thread to the current CPU until we return from the interrupt.
*/
sched_pin();
error = ithread_schedule(ithd);
KASSERT(error == 0, ("got an impossible stray interrupt"));
sched_unpin();
}