Re: [patch -mm] mm, thp: fix mlock statistics fix

[Andrew Morton <akpm@linux-foundation.org>]

On Wed, 3 Oct 2012 14:10:41 -0700 (PDT)
David Rientjes <rientjes@google.com> wrote:

> > The free_page_mlock() hunk gets dropped because free_page_mlock() is
> > removed.  And clear_page_mlock() doesn't need this treatment.  But
> > please check my handiwork.
> > 
> 
> I reviewed what was merged into -mm and clear_page_mlock() does need this 
> fix as well.

argh, it got me *again*.  grr.

From: Andrew Morton <akpm@linux-foundation.org>
Subject: mm: document PageHuge somewhat

Cc: David Rientjes <rientjes@google.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    5 +++++
 1 file changed, 5 insertions(+)

diff -puN mm/hugetlb.c~mm-document-pagehuge-somewhat mm/hugetlb.c
--- a/mm/hugetlb.c~mm-document-pagehuge-somewhat
+++ a/mm/hugetlb.c
@@ -671,6 +671,11 @@ static void prep_compound_gigantic_page(
 	}
 }
 
+/*
+ * PageHuge() only returns true for hugetlbfs pages, but not for normal or
+ * transparent huge pages.  See the PageTransHuge() documentation for more
+ * details.
+ */
 int PageHuge(struct page *page)
 {
 	compound_page_dtor *dtor;
_


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