Messages in this thread Patch in this message | | | Date | Fri, 27 Jul 2012 21:53:24 +0800 | Subject | [RFC patch] vm: clear swap entry before copying pte | From | Hillf Danton <> |
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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 <dhillf@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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