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| author | Yang Shi <shy828301@gmail.com> | 2021-06-30 18:51:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-06-30 20:47:30 -0700 |
| commit | 662aeea7536d84d7e1d01739694e4748ba294ce0 (patch) | |
| tree | 7707f39d37f006fd4657272aeb12da36a1375083 /lib/Makefile | |
| parent | b0b515bfb3f4f3dc208862989e38ee5268a1003f (diff) | |
| download | linux-662aeea7536d84d7e1d01739694e4748ba294ce0.tar.gz linux-662aeea7536d84d7e1d01739694e4748ba294ce0.tar.bz2 linux-662aeea7536d84d7e1d01739694e4748ba294ce0.zip | |
mm: migrate: check mapcount for THP instead of refcount
The generic migration path will check refcount, so no need check refcount
here. But the old code actually prevents from migrating shared THP
(mapped by multiple processes), so bail out early if mapcount is > 1 to
keep the behavior.
Link: https://lkml.kernel.org/r/20210518200801.7413-7-shy828301@gmail.com
Signed-off-by: Yang Shi <shy828301@gmail.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/Makefile')
0 files changed, 0 insertions, 0 deletions