Re: [PATCH 3/3] mm,migration: Remove straggling migration PTEswhen page tables are being moved after the VMA has already moved

[Andrea Arcangeli]

On Wed, Apr 28, 2010 at 09:03:02AM +0900, KAMEZAWA Hiroyuki wrote:
> I bet calling __get_user_pages_fast() before vma_adjust() is the way to go. 
> When page_count(page) != page_mapcount(page) +1, migration skip it.

My proposed fix avoids to walk the pagetables once more time and to
mangle over the page counts. Can you check it? It works but it needs
more review.
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