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| author | Andrea Arcangeli <aarcange@redhat.com> | 2014-01-21 15:48:49 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-21 16:19:43 -0800 |
| commit | a0368d4e48fc9ad65a66f6819a801f3f542b4f0f (patch) | |
| tree | cf3ba6417cff86a8b9d0e00d2ce1d80fa70568ec /mm/hugetlb.c | |
| parent | 0e147aed4c250766e657855db55a395d2c8008a5 (diff) | |
| download | lwn-a0368d4e48fc9ad65a66f6819a801f3f542b4f0f.tar.gz lwn-a0368d4e48fc9ad65a66f6819a801f3f542b4f0f.zip | |
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@redhat.com>
Tested-by: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Pravin Shelar <pshelar@nicira.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Ben Hutchings <bhutchings@solarflare.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Johannes Weiner <jweiner@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index dee6cf4e6d34..7596e104bffa 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -3079,7 +3079,7 @@ long follow_hugetlb_page(struct mm_struct *mm, struct vm_area_struct *vma, same_page: if (pages) { pages[i] = mem_map_offset(page, pfn_offset); - get_page(pages[i]); + get_page_foll(pages[i]); } if (vmas) |