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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2016-07-27 00:25:26 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-27 01:19:19 +0200 |
| commit | dd78fedde4b99b322f2dc849d467d365a82e23ca (patch) | |
| tree | 5095c6e9fd2527a8636188059e35f7f45b9648a2 /kernel/task_work.c | |
| parent | mm: postpone page table allocation until we have page to map (diff) | |
| download | linux-dd78fedde4b99b322f2dc849d467d365a82e23ca.tar.xz linux-dd78fedde4b99b322f2dc849d467d365a82e23ca.zip | |
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 'kernel/task_work.c')
0 files changed, 0 insertions, 0 deletions