mm/compaction: more trace to understand when/why compaction start/finish
authorJoonsoo Kim <iamjoonsoo.kim@lge.com>
Wed, 11 Feb 2015 23:27:06 +0000 (15:27 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 12 Feb 2015 01:06:04 +0000 (17:06 -0800)
commit837d026d560c5ef26abeca0441713d82e4e82cad
tree074e7941df8d83fc7fdb0680883989c84c3d654c
parente34d85f0e3c60f7226e5589898b7c7c5cd2a4f02
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>
include/linux/compaction.h
include/trace/events/compaction.h
mm/compaction.c