diff options
| author | Mel Gorman <mgorman@suse.de> | 2014-01-07 14:00:45 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 12:25:14 -0800 |
| commit | fd5df8002f7668ac04a53b1b6d75296ad191a136 (patch) | |
| tree | b5e1de83ba1d5e14e1f57ddeb79e5da3ec2d6bee /include | |
| parent | 3d792d616ba408ab55a54c1bb75a9367d997acfa (diff) | |
mm: numa: avoid unnecessary disruption of NUMA hinting during migration
commit de466bd628e8d663fdf3f791bc8db318ee85c714 upstream.
do_huge_pmd_numa_page() handles the case where there is parallel THP
migration. However, by the time it is checked the NUMA hinting
information has already been disrupted. This patch adds an earlier
check with some helpers.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/migrate.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 8d3c57fdf221..804651c62296 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -90,10 +90,18 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping, #endif /* CONFIG_MIGRATION */ #ifdef CONFIG_NUMA_BALANCING -extern int migrate_misplaced_page(struct page *page, int node); +extern bool pmd_trans_migrating(pmd_t pmd); +extern void wait_migrate_huge_page(struct anon_vma *anon_vma, pmd_t *pmd); extern int migrate_misplaced_page(struct page *page, int node); extern bool migrate_ratelimited(int node); #else +static inline bool pmd_trans_migrating(pmd_t pmd) +{ + return false; +} +static inline void wait_migrate_huge_page(struct anon_vma *anon_vma, pmd_t *pmd) +{ +} static inline int migrate_misplaced_page(struct page *page, int node) { return -EAGAIN; /* can't migrate now */ |