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-rw-r--r--vm/vm_page.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/vm/vm_page.c b/vm/vm_page.c
index 4fde0759..00edb3c6 100644
--- a/vm/vm_page.c
+++ b/vm/vm_page.c
@@ -1027,6 +1027,8 @@ vm_page_seg_balance_page(struct vm_page_seg *seg,
vm_page_copy(src, dest);
if (!src->dirty) {
+ /* Avoid spuriously thinking the page is now dirty just because we have
+ * copied the data into it just above. */
pmap_clear_modify(dest->phys_addr);
}