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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2015-02-12 02:27:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-12 04:06:04 +0300
commit16c4a097a035c01809aa0c0abd458ca1fe4ff3d0 (patch)
treefe961117b89c43c293d4914c5301ec59da390c6b /include/linux
parent4645f06334be1ad0eb61aa182c7999fe51bc1ba6 (diff)
downloadlinux-16c4a097a035c01809aa0c0abd458ca1fe4ff3d0.tar.xz
mm/compaction: enhance tracepoint output for compaction begin/end
We now have tracepoint for begin event of compaction and it prints start position of both scanners, but, tracepoint for end event of compaction doesn't print finish position of both scanners. It'd be also useful to know finish position of both scanners so this patch add it. It will help to find odd behavior or problem on compaction internal logic. And mode is added to both begin/end tracepoint output, since according to mode, compaction behavior is quite different. And lastly, status format is changed to string rather than status number for readability. [akpm@linux-foundation.org: fix sparse warning] Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Mel Gorman <mgorman@suse.de> Cc: David Rientjes <rientjes@google.com> Cc: Dan Carpenter <dan.carpenter@oracle.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.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index f2efda2e6ac6..db64cae06530 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -12,6 +12,7 @@
#define COMPACT_PARTIAL 3
/* The full zone was compacted */
#define COMPACT_COMPLETE 4
+/* When adding new state, please change compaction_status_string, too */
/* Used to signal whether compaction detected need_sched() or lock contention */
/* No contention detected */