diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2017-02-24 14:57:45 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-02-24 17:46:55 -0800 |
| commit | ace71a19cec5eb430207c3269d8a2683f0574306 (patch) | |
| tree | a4008d66fc253ba7a0b15c80f9df6306aa409ec3 /mm/huge_memory.c | |
| parent | c8394812e56fbc334d815226268cea69b447d461 (diff) | |
mm: introduce page_vma_mapped_walk()
Introduce a new interface to check if a page is mapped into a vma. It
aims to address shortcomings of page_check_address{,_transhuge}.
Existing interface is not able to handle PTE-mapped THPs: it only finds
the first PTE. The rest lefted unnoticed.
page_vma_mapped_walk() iterates over all possible mapping of the page in
the vma.
Link: http://lkml.kernel.org/r/20170129173858.45174-3-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hillf.zj@alibaba-inc.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 85742ac5b32e..a7bac4f2b78a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2129,9 +2129,12 @@ static void freeze_page(struct page *page) static void unfreeze_page(struct page *page) { int i; - - for (i = 0; i < HPAGE_PMD_NR; i++) - remove_migration_ptes(page + i, page + i, true); + if (PageTransHuge(page)) { + remove_migration_ptes(page, page, true); + } else { + for (i = 0; i < HPAGE_PMD_NR; i++) + remove_migration_ptes(page + i, page + i, true); + } } static void __split_huge_page_tail(struct page *head, int tail, |