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-rw-r--r--mm/compaction.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 1a8894eadf72..20011a850fef 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -16,6 +16,9 @@
#include <linux/sysfs.h>
#include "internal.h"
+#define CREATE_TRACE_POINTS
+#include <trace/events/compaction.h>
+
/*
* compact_control is used to track pages being migrated and the free pages
* they are being migrated to during memory compaction. The free_pfn starts
@@ -60,7 +63,7 @@ static unsigned long isolate_freepages_block(struct zone *zone,
struct list_head *freelist)
{
unsigned long zone_end_pfn, end_pfn;
- int total_isolated = 0;
+ int nr_scanned = 0, total_isolated = 0;
struct page *cursor;
/* Get the last PFN we should scan for free pages at */
@@ -81,6 +84,7 @@ static unsigned long isolate_freepages_block(struct zone *zone,
if (!pfn_valid_within(blockpfn))
continue;
+ nr_scanned++;
if (!PageBuddy(page))
continue;
@@ -100,6 +104,7 @@ static unsigned long isolate_freepages_block(struct zone *zone,
}
}
+ trace_mm_compaction_isolate_freepages(nr_scanned, total_isolated);
return total_isolated;
}
@@ -234,6 +239,7 @@ static unsigned long isolate_migratepages(struct zone *zone,
struct compact_control *cc)
{
unsigned long low_pfn, end_pfn;
+ unsigned long nr_scanned = 0, nr_isolated = 0;
struct list_head *migratelist = &cc->migratepages;
/* Do not scan outside zone boundaries */
@@ -266,6 +272,7 @@ static unsigned long isolate_migratepages(struct zone *zone,
struct page *page;
if (!pfn_valid_within(low_pfn))
continue;
+ nr_scanned++;
/* Get the page and skip if free */
page = pfn_to_page(low_pfn);
@@ -280,6 +287,7 @@ static unsigned long isolate_migratepages(struct zone *zone,
del_page_from_lru_list(zone, page, page_lru(page));
list_add(&page->lru, migratelist);
cc->nr_migratepages++;
+ nr_isolated++;
/* Avoid isolating too much */
if (cc->nr_migratepages == COMPACT_CLUSTER_MAX)
@@ -291,6 +299,8 @@ static unsigned long isolate_migratepages(struct zone *zone,
spin_unlock_irq(&zone->lru_lock);
cc->migrate_pfn = low_pfn;
+ trace_mm_compaction_isolate_migratepages(nr_scanned, nr_isolated);
+
return cc->nr_migratepages;
}
@@ -401,6 +411,8 @@ static int compact_zone(struct zone *zone, struct compact_control *cc)
count_vm_events(COMPACTPAGES, nr_migrate - nr_remaining);
if (nr_remaining)
count_vm_events(COMPACTPAGEFAILED, nr_remaining);
+ trace_mm_compaction_migratepages(nr_migrate - nr_remaining,
+ nr_remaining);
/* Release LRU pages not migrated */
if (!list_empty(&cc->migratepages)) {