diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2016-07-27 01:25:26 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-27 02:19:19 +0300 |
| commit | dd78fedde4b99b322f2dc849d467d365a82e23ca (patch) | |
| tree | 5095c6e9fd2527a8636188059e35f7f45b9648a2 /include/linux/rmap.h | |
| parent | 7267ec008b5cd8b3579e188b1ff238815643e372 (diff) | |
| download | linux-dd78fedde4b99b322f2dc849d467d365a82e23ca.tar.xz | |
rmap: support file thp
Naive approach: on mapping/unmapping the page as compound we update
->_mapcount on each 4k page. That's not efficient, but it's not obvious
how we can optimize this. We can look into optimization later.
PG_double_map optimization doesn't work for file pages since lifecycle
of file pages is different comparing to anon pages: file page can be
mapped again at any time.
Link: http://lkml.kernel.org/r/1466021202-61880-11-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/rmap.h')
| -rw-r--r-- | include/linux/rmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h index 2b0fad83683f..b46bb5620a76 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -165,7 +165,7 @@ void do_page_add_anon_rmap(struct page *, struct vm_area_struct *, unsigned long, int); void page_add_new_anon_rmap(struct page *, struct vm_area_struct *, unsigned long, bool); -void page_add_file_rmap(struct page *); +void page_add_file_rmap(struct page *, bool); void page_remove_rmap(struct page *, bool); void hugepage_add_anon_rmap(struct page *, struct vm_area_struct *, |