[PATCH v10 5/5] mm: add vm event counters for balloon pages compaction
From: Rafael Aquini <hidden>
Date: 2012-09-17 16:39:13
Also in:
lkml
Subsystem:
memory management, memory management - core, memory management - memory policy and migration, the rest, virtio balloon, virtio core · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds, "Michael S. Tsirkin", Jason Wang
This patch introduces a new set of vm event counters to keep track of ballooned pages compaction activity. Signed-off-by: Rafael Aquini <redacted> --- drivers/virtio/virtio_balloon.c | 1 + include/linux/vm_event_item.h | 8 +++++++- mm/balloon_compaction.c | 2 ++ mm/migrate.c | 1 + mm/vmstat.c | 10 +++++++++- 5 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index a52c768..c57d1ed 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c@@ -541,6 +541,7 @@ int virtballoon_migratepage(struct address_space *mapping, mutex_unlock(&vb->balloon_lock); wake_up(&vb->config_change); + count_balloon_event(COMPACTBALLOONMIGRATED); return BALLOON_MIGRATION_RETURN; }
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 57f7b10..13573fe 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h@@ -41,7 +41,13 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, #ifdef CONFIG_COMPACTION COMPACTBLOCKS, COMPACTPAGES, COMPACTPAGEFAILED, COMPACTSTALL, COMPACTFAIL, COMPACTSUCCESS, -#endif +#ifdef CONFIG_BALLOON_COMPACTION + COMPACTBALLOONISOLATED, /* isolated from balloon pagelist */ + COMPACTBALLOONMIGRATED, /* balloon page sucessfully migrated */ + COMPACTBALLOONRELEASED, /* old-page released after migration */ + COMPACTBALLOONRETURNED, /* putback to pagelist, not-migrated */ +#endif /* CONFIG_BALLOON_COMPACTION */ +#endif /* CONFIG_COMPACTION */ #ifdef CONFIG_HUGETLB_PAGE HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL, #endif
diff --git a/mm/balloon_compaction.c b/mm/balloon_compaction.c
index 74c09ab..873af56 100644
--- a/mm/balloon_compaction.c
+++ b/mm/balloon_compaction.c@@ -98,6 +98,7 @@ bool isolate_balloon_page(struct page *page) if (__is_movable_balloon_page(page) && page_count(page) == 2) { __isolate_balloon_page(page); + count_balloon_event(COMPACTBALLOONISOLATED); unlock_page(page); return true; }
@@ -120,6 +121,7 @@ void putback_balloon_page(struct page *page) if (__is_movable_balloon_page(page)) { __putback_balloon_page(page); put_page(page); + count_balloon_event(COMPACTBALLOONRETURNED); } else { __WARN(); dump_page(page);
diff --git a/mm/migrate.c b/mm/migrate.c
index e47daf5..124b16b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c@@ -896,6 +896,7 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private, list_del(&page->lru); put_page(page); __free_page(page); + count_balloon_event(COMPACTBALLOONRELEASED); return 0; } out:
diff --git a/mm/vmstat.c b/mm/vmstat.c
index df7a674..5824ad2 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c@@ -768,7 +768,15 @@ const char * const vmstat_text[] = { "compact_stall", "compact_fail", "compact_success", -#endif + +#ifdef CONFIG_BALLOON_COMPACTION + "compact_balloon_isolated", + "compact_balloon_migrated", + "compact_balloon_released", + "compact_balloon_returned", +#endif /* CONFIG_BALLOON_COMPACTION */ + +#endif /* CONFIG_COMPACTION */ #ifdef CONFIG_HUGETLB_PAGE "htlb_buddy_alloc_success",
--
1.7.11.4
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