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SubjectRe: [PATCH] autonuma: release page_table_lock in scanning pmd
On Tue, Mar 20, 2012 at 08:30:48PM +0800, Hillf Danton wrote:
> Only for unlikely corner case, unlock is added to pair lock.
>
> Signed-off-by: Hillf Danton <dhillf@gmail.com>
> ---
>
> --- a/mm/autonuma.c Sat Mar 17 11:01:50 2012
> +++ b/mm/autonuma.c Tue Mar 20 19:58:44 2012
> @@ -522,7 +522,8 @@ static int knumad_scan_pmd(struct mm_str
> spin_unlock(&mm->page_table_lock);
> goto out;
> }
> - }
> + } else
> + spin_unlock(&mm->page_table_lock);
> }
>
> VM_BUG_ON(!pmd_present(*pmd));

I'm impressed by how fast you found these bugs.

Thanks a lot, applied!
Andrea


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