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D52733.id163791.diff
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D52733.id163791.diff

diff --git a/sys/vm/vm_domainset.c b/sys/vm/vm_domainset.c
--- a/sys/vm/vm_domainset.c
+++ b/sys/vm/vm_domainset.c
@@ -113,7 +113,6 @@
int d;
d = di->di_offset % di->di_domain->ds_cnt;
- *di->di_iter = d;
*domain = di->di_domain->ds_order[d];
}
@@ -260,9 +259,14 @@
* are immutable and unsynchronized. Updates can race but pointer
* loads are assumed to be atomic.
*/
- if (obj != NULL && obj->domain.dr_policy != NULL)
+ if (obj != NULL && obj->domain.dr_policy != NULL) {
+ /*
+ * This write lock protects non-atomic increments of the
+ * iterator index in vm_domainset_iter_rr().
+ */
+ VM_OBJECT_ASSERT_WLOCKED(obj);
dr = &obj->domain;
- else
+ } else
dr = &curthread->td_domain;
vm_domainset_iter_init(di, dr->dr_policy, &dr->dr_iter, obj, pindex);

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