On Tue, Jan 18, 2011 at 12:09:54AM +0900, Minchan Kim wrote:

And don't we need this patch, either?

I think we need your fix too.

I thought about that but I wasn't sure (I was focusing on Chris's bug
that had no hugetlbfs involvement), but your patch makes it more
obvious. At least that place wouldn't risk to break silently ;). I
guess hugepage migration from memory failure wasn't much tested yet...

Maybe it'd be cleaner to add a putback_lru_huge_pages but I don't mind
because it seems nothing but memory-failure will ever attempt to
migrate an hugepage.

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