diff options
| author | Alistair Popple <[email protected]> | 2021-11-10 20:32:40 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2021-11-11 09:34:35 -0800 |
| commit | ab09243aa95a72bac5c71e852773de34116f8d0f (patch) | |
| tree | 825f51109c310ac95b1bf5278394badbec8fd6dc /include/linux | |
| parent | 0ef024621417fa3fcdeb2c3320f90ee34e18a5d9 (diff) | |
mm/migrate.c: remove MIGRATE_PFN_LOCKED
MIGRATE_PFN_LOCKED is used to indicate to migrate_vma_prepare() that a
source page was already locked during migrate_vma_collect(). If it
wasn't then the a second attempt is made to lock the page. However if
the first attempt failed it's unlikely a second attempt will succeed,
and the retry adds complexity. So clean this up by removing the retry
and MIGRATE_PFN_LOCKED flag.
Destination pages are also meant to have the MIGRATE_PFN_LOCKED flag
set, but nothing actually checks that.
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Alistair Popple <[email protected]>
Reviewed-by: Ralph Campbell <[email protected]>
Acked-by: Felix Kuehling <[email protected]>
Cc: Alex Deucher <[email protected]>
Cc: Jerome Glisse <[email protected]>
Cc: John Hubbard <[email protected]>
Cc: Zi Yan <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Ben Skeggs <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/migrate.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index eeb818c4fc78..4850cc5bf813 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -110,7 +110,6 @@ static inline int migrate_misplaced_page(struct page *page, */ #define MIGRATE_PFN_VALID (1UL << 0) #define MIGRATE_PFN_MIGRATE (1UL << 1) -#define MIGRATE_PFN_LOCKED (1UL << 2) #define MIGRATE_PFN_WRITE (1UL << 3) #define MIGRATE_PFN_SHIFT 6 |