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mm: make remove_migration_ptes() beyond mm/migration.c

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Make remove_migration_ptes() available to be used in split_huge_page().

New parameter 'locked' added: as with try_to_umap() we need a way to
indicate that caller holds rmap lock.

We also shouldn't try to mlock() pte-mapped huge pages: pte-mapeed THP
pages are never mlocked.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2016-03-17 14:20:07 -07:00 • committed by Linus Torvalds
parent 2a52bcbcc6
commit e388466de4
2 changed files with 11 additions and 6 deletions
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2
include/linux/rmap.h
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@ -243,6 +243,8 @@ int page_mkclean(struct page *);
*/
int try_to_munlock(struct page *);
void remove_migration_ptes(struct page *old, struct page *new, bool locked);
/*
* Called by memory-failure.c to kill processes.
*/