Subject: [merged] mm-hugetlb-use-get_page_foll-in-follow_hugetlb_page.patch removed from -mm tree
To: aarcange@xxxxxxxxxx,andi@xxxxxxxxxxxxxx,bhutchings@xxxxxxxxxxxxxx,cl@xxxxxxxxx,gregkh@xxxxxxxxxxxxxxxxxxx,jweiner@xxxxxxxxxx,khalid.aziz@xxxxxxxxxx,mgorman@xxxxxxx,minchan@xxxxxxxxxx,pshelar@xxxxxxxxxx,riel@xxxxxxxxxx,mm-commits@xxxxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 22 Jan 2014 12:12:19 -0800
The patch titled
Subject: mm: hugetlb: use get_page_foll() in follow_hugetlb_page()
has been removed from the -mm tree. Its filename was
mm-hugetlb-use-get_page_foll-in-follow_hugetlb_page.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Subject: mm: hugetlb: use get_page_foll() in follow_hugetlb_page()
get_page_foll() is more optimal and is always safe to use under the PT
lock. More so for hugetlbfs as there's no risk of race conditions with
split_huge_page regardless of the PT lock.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Tested-by: Khalid Aziz <khalid.aziz@xxxxxxxxxx>
Cc: Pravin Shelar <pshelar@xxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Ben Hutchings <bhutchings@xxxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: Johannes Weiner <jweiner@xxxxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: Minchan Kim <minchan@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/hugetlb.c~mm-hugetlb-use-get_page_foll-in-follow_hugetlb_page mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-use-get_page_foll-in-follow_hugetlb_page
+++ a/mm/hugetlb.c
@@ -3079,7 +3079,7 @@ long follow_hugetlb_page(struct mm_struc
same_page:
if (pages) {
pages[i] = mem_map_offset(page, pfn_offset);
- get_page(pages[i]);
+ get_page_foll(pages[i]);
}
if (vmas)
_
Patches currently in -mm which might be from aarcange@xxxxxxxxxx are
origin.patch
mm-munlock-fix-potential-race-with-thp-page-split.patch
mm-fix-the-theoretical-compound_lock-vs-prep_new_page-race.patch
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