Dave wrote:
> On 03/14/2013 10:50 AM, Kirill A. Shutemov wrote:
> > +static int split_anon_huge_page(struct page *page)
> > {
> > struct anon_vma *anon_vma;
> > int ret = 1;
> >
> > - BUG_ON(is_huge_zero_pfn(page_to_pfn(page)));
> > - BUG_ON(!PageAnon(page));
>
> Did you really mean to kill these BUG_ON()s? They still look relevant
> to me.
The zero page BUG_ON() is moved to new split_huge_page().
!PageAnon(page) we now can handle.
Note: nobody should call split_anon_huge_page() directly, only
split_huge_page().
--
Kirill A. Shutemov
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