If swap entry is cleared, we can see the reason that copying pte is
interrupted. If due to page table lock held long enough, no need to
increase swap count.
Signed-off-by: Hillf Danton <dhi...@gmail.com>
---
--- a/mm/memory.c Fri Jul 27 21:33:32 2012
+++ b/mm/memory.c Fri Jul 27 21:35:24 2012
@@ -971,6 +971,7 @@ again:
if (add_swap_count_continuation(entry, GFP_KERNEL) < 0)
return -ENOMEM;
progress = 0;
+ entry.val = 0;
}
if (addr != end)
goto again;
--
--
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