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| author |   Peter Zijlstra <a.p.zijlstra@chello.nl> | 2012-10-25 14:16:34 +0200 |
|---|---|---|
| committer |   Mel Gorman <mgorman@suse.de> | 2012-12-11 14:42:41 +0000 |
| commit | 7039e1dbec6eeaa8ecab43a82d6589eeced995c3 (patch) | |
| tree | ffd8b5a571c5d385c61122da097cdd8b666ca02f /include/linux/migrate.h | |
| parent | mm: mempolicy: Check for misplaced page (diff) | |
| download | linux-dev-7039e1dbec6eeaa8ecab43a82d6589eeced995c3.tar.xz linux-dev-7039e1dbec6eeaa8ecab43a82d6589eeced995c3.zip | |
mm: migrate: Introduce migrate_misplaced_page()
Note: This was originally based on Peter's patch "mm/migrate: Introduce
migrate_misplaced_page()" but borrows extremely heavily from Andrea's
"autonuma: memory follows CPU algorithm and task/mm_autonuma stats
collection". The end result is barely recognisable so signed-offs
had to be dropped. If original authors are ok with it, I'll
re-add the signed-off-bys.
Add migrate_misplaced_page() which deals with migrating pages from
faults.
Based-on-work-by: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Based-on-work-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Based-on-work-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Diffstat (limited to 'include/linux/migrate.h')
| -rw-r--r-- | include/linux/migrate.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 9d1c159e2427..f0d0313eea6f 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -13,6 +13,7 @@ enum migrate_reason { MR_MEMORY_HOTPLUG, MR_SYSCALL, /* also applies to cpusets */ MR_MEMPOLICY_MBIND, + MR_NUMA_MISPLACED, MR_CMA }; @@ -73,4 +74,14 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping, #define fail_migrate_page NULL #endif /* CONFIG_MIGRATION */ + +#ifdef CONFIG_NUMA_BALANCING +extern int migrate_misplaced_page(struct page *page, int node); +#else +static inline int migrate_misplaced_page(struct page *page, int node) +{ + return -EAGAIN; /* can't migrate now */ +} +#endif /* CONFIG_NUMA_BALANCING */ + #endif /* _LINUX_MIGRATE_H */ |