On Sat, Nov 24, 2012 at 12:27:39PM +0800, Hillf Danton wrote:
> If fail to migrate thp(due to unsuccessful isolation), and if the original
> pmd entry is changed after reaquiring page table lock, it is unsafe to
> release the page lock as page maybe unstable.
>
> It is fixed by raising extra page
If fail to migrate thp(due to unsuccessful isolation), and if the original
pmd entry is changed after reaquiring page table lock, it is unsafe to
release the page lock as page maybe unstable.
It is fixed by raising extra page count before trying migration.
Signed-off-by: Hillf Danton
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