D23483.id67708.diff
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D23483.id67708.diff
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	Index: sys/kern/kern_intr.c
	===================================================================
	--- sys/kern/kern_intr.c
	+++ sys/kern/kern_intr.c
	@@ -1208,6 +1208,7 @@
	struct thread *td;
	struct proc *p;
	int wake, epoch_count;
	+ bool needs_epoch;

	td = curthread;
	p = td->td_proc;
	@@ -1242,20 +1243,21 @@
	* that the load of ih_need in ithread_execute_handlers()
	* is ordered after the load of it_need here.
	*/
	- if (ie->ie_hflags & IH_NET) {
	+ needs_epoch = (ie->ie_hflags & IH_NET) ? true : false;
	+ if (needs_epoch) {
	epoch_count = 0;
	NET_EPOCH_ENTER(et);
	}
	while (atomic_cmpset_acq_int(&ithd->it_need, 1, 0) != 0) {
	ithread_execute_handlers(p, ie);
	- if ((ie->ie_hflags & IH_NET) &&
	+ if (needs_epoch &&
	++epoch_count >= intr_epoch_batch) {
	NET_EPOCH_EXIT(et);
	epoch_count = 0;
	NET_EPOCH_ENTER(et);
	}
	}
	- if (ie->ie_hflags & IH_NET)
	+ if (needs_epoch)
	NET_EPOCH_EXIT(et);
	WITNESS_WARN(WARN_PANIC, NULL, "suspending ithread");
	mtx_assert(&Giant, MA_NOTOWNED);