diff options
| author |   Andrea Arcangeli <aarcange@redhat.com> | 2011-01-13 15:47:11 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 17:32:46 -0800 |
| commit | 5a03b051ed87e72b959f32a86054e1142ac4cf55 (patch) | |
| tree | 31f0e8efb86d48b0292f8a7ea4bd9cf7c930a0ab /include/linux/compaction.h | |
| parent | thp: freeze khugepaged and ksmd (diff) | |
| download | linux-dev-5a03b051ed87e72b959f32a86054e1142ac4cf55.tar.xz linux-dev-5a03b051ed87e72b959f32a86054e1142ac4cf55.zip | |
thp: use compaction in kswapd for GFP_ATOMIC order > 0
This takes advantage of memory compaction to properly generate pages of
order > 0 if regular page reclaim fails and priority level becomes more
severe and we don't reach the proper watermarks.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/compaction.h')
| -rw-r--r-- | include/linux/compaction.h | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/include/linux/compaction.h b/include/linux/compaction.h index 72cba4034785..dfa2ed4c0d26 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -11,6 +11,9 @@ /* The full zone was compacted */ #define COMPACT_COMPLETE 3 +#define COMPACT_MODE_DIRECT_RECLAIM 0 +#define COMPACT_MODE_KSWAPD 1 + #ifdef CONFIG_COMPACTION extern int sysctl_compact_memory; extern int sysctl_compaction_handler(struct ctl_table *table, int write, @@ -25,7 +28,8 @@ extern unsigned long try_to_compact_pages(struct zonelist *zonelist, bool sync); extern unsigned long compaction_suitable(struct zone *zone, int order); extern unsigned long compact_zone_order(struct zone *zone, int order, - gfp_t gfp_mask, bool sync); + gfp_t gfp_mask, bool sync, + int compact_mode); /* Do not skip compaction more than 64 times */ #define COMPACT_MAX_DEFER_SHIFT 6 @@ -70,9 +74,10 @@ static inline unsigned long compaction_suitable(struct zone *zone, int order) } static inline unsigned long compact_zone_order(struct zone *zone, int order, - gfp_t gfp_mask, bool sync) + gfp_t gfp_mask, bool sync, + int compact_mode) { - return 0; + return COMPACT_CONTINUE; } static inline void defer_compaction(struct zone *zone) |