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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2015-02-11 15:27:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-02-11 17:06:04 -0800
commite34d85f0e3c60f7226e5589898b7c7c5cd2a4f02 (patch)
tree84b0daa5ee68e08134f6309a45f7106c463decbd /mm
parent16c4a097a035c01809aa0c0abd458ca1fe4ff3d0 (diff)
downloadlinux-e34d85f0e3c60f7226e5589898b7c7c5cd2a4f02.tar.bz2
mm/compaction: print current range where compaction work
It'd be useful to know current range where compaction work for detailed analysis. With it, we can know pageblock where we actually scan and isolate, and, how much pages we try in that pageblock and can guess why it doesn't become freepage with pageblock order roughly. 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/compaction.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 66f7c365e888..b12df9fe10b4 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -430,11 +430,12 @@ isolate_fail:
}
+ trace_mm_compaction_isolate_freepages(*start_pfn, blockpfn,
+ nr_scanned, total_isolated);
+
/* Record how far we have got within the block */
*start_pfn = blockpfn;
- trace_mm_compaction_isolate_freepages(nr_scanned, total_isolated);
-
/*
* If strict isolation is requested by CMA then check that all the
* pages requested were isolated. If there were any failures, 0 is
@@ -590,6 +591,7 @@ isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,
unsigned long flags = 0;
bool locked = false;
struct page *page = NULL, *valid_page = NULL;
+ unsigned long start_pfn = low_pfn;
/*
* Ensure that there are not too many pages isolated from the LRU
@@ -750,7 +752,8 @@ isolate_success:
if (low_pfn == end_pfn)
update_pageblock_skip(cc, valid_page, nr_isolated, true);
- trace_mm_compaction_isolate_migratepages(nr_scanned, nr_isolated);
+ trace_mm_compaction_isolate_migratepages(start_pfn, low_pfn,
+ nr_scanned, nr_isolated);
count_compact_events(COMPACTMIGRATE_SCANNED, nr_scanned);
if (nr_isolated)