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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Hillf Danton <dhillf@gmail.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Andrew Morton <akpm@linux-foundation.org>,
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        "Kirill A. Shutemov" <kirill@shutemov.name>,
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Subject: Re: [PATCHv2, RFC 19/30] thp, mm: split huge page on mmap file page
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Date: Fri, 15 Mar 2013 15:45:28 +0200 (EET)
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Hillf Danton wrote:
> On Fri, Mar 15, 2013 at 9:29 PM, Kirill A. Shutemov
> <kirill.shutemov@linux.intel.com> wrote:
> > Hillf Danton wrote:
> >> On Fri, Mar 15, 2013 at 1:50 AM, Kirill A. Shutemov
> >> <kirill.shutemov@linux.intel.com> wrote:
> >> >
> >> > We are not ready to mmap file-backed tranparent huge pages.
> >> >
> >> It is not on todo list either.
> >
> > Actually, following patches implement mmap for file-backed thp and this
> > split_huge_page() will catch only fallback cases.
> >
> I wonder if the effort we pay for THP cache is nuked by mmap.

I will not be nuked after patch 30/30.

Actually, it will be splited only if process tries to map hugepage with
unsuitable alignment.

-- 
 Kirill A. Shutemov
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