D23440.id67579.diff
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D23440.id67579.diff
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	Index: head/tools/uma/smrstress/smrstress.c
	===================================================================
	--- head/tools/uma/smrstress/smrstress.c
	+++ head/tools/uma/smrstress/smrstress.c
	@@ -84,7 +84,7 @@
	/* Wait for the writer to exit. */
	while (smrs_completed == 0) {
	smr_enter(smrs_smr);
	- cur = (void *)atomic_load_ptr(&smrs_current);
	+ cur = (void *)atomic_load_acq_ptr(&smrs_current);
	if (cur->generation == -1)
	smrs_error(cur, "read early: Use after free!\n");
	atomic_add_int(&cur->count, 1);
	@@ -107,6 +107,7 @@

	for (i = 0; i < smrs_iterations; i++) {
	cur = uma_zalloc_smr(smrs_zone, M_WAITOK);
	+ atomic_thread_fence_rel();
	cur = (void *)atomic_swap_ptr(&smrs_current, (uintptr_t)cur);
	uma_zfree_smr(smrs_zone, cur);
	}