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| author | Joonsoo Kim <iamjoonsoo.kim@lge.com> | 2015-02-11 15:27:06 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-02-11 17:06:04 -0800 |
| commit | 837d026d560c5ef26abeca0441713d82e4e82cad (patch) | |
| tree | 074e7941df8d83fc7fdb0680883989c84c3d654c /include/linux | |
| parent | e34d85f0e3c60f7226e5589898b7c7c5cd2a4f02 (diff) | |
| download | lwn-837d026d560c5ef26abeca0441713d82e4e82cad.tar.gz lwn-837d026d560c5ef26abeca0441713d82e4e82cad.zip | |
mm/compaction: more trace to understand when/why compaction start/finish
It is not well analyzed that when/why compaction start/finish or not.
With these new tracepoints, we can know much more about start/finish
reason of compaction. I can find following bug with these tracepoint.
http://www.spinics.net/lists/linux-mm/msg81582.html
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@suse.de>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/compaction.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/compaction.h b/include/linux/compaction.h index db64cae06530..501d7513aac1 100644 --- a/include/linux/compaction.h +++ b/include/linux/compaction.h @@ -12,6 +12,9 @@ #define COMPACT_PARTIAL 3 /* The full zone was compacted */ #define COMPACT_COMPLETE 4 +/* For more detailed tracepoint output */ +#define COMPACT_NO_SUITABLE_PAGE 5 +#define COMPACT_NOT_SUITABLE_ZONE 6 /* When adding new state, please change compaction_status_string, too */ /* Used to signal whether compaction detected need_sched() or lock contention */ |