On Thu, Nov 17, 2016 at 02:11:30PM -0500, Johannes Weiner wrote:
> When a radix tree iteration drops the tree lock, another thread might
> swoop in and free the node holding the current slot. The iteration
> needs to do another tree lookup from the current index to continue.
>
> [kirill.shutemov@xxxxxxxxxxxxxxx: re-lookup for replacement]
> Fixes: f3f0e1d2150b ("khugepaged: add support of collapse for tmpfs/shmem pages")
> Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
--
Kirill A. Shutemov
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