[PATCH v8 5/5] mm: add vm event counters for balloon pages compaction
From: Rafael Aquini <hidden>
Date: 2012-08-21 12:48:36
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 | 2 ++ include/linux/vm_event_item.h | 8 +++++++- mm/balloon_compaction.c | 6 ++++-- mm/migrate.c | 1 + mm/vmstat.c | 10 +++++++++- 5 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index bda7bb0..c358ed3 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c@@ -449,6 +449,8 @@ int virtballoon_migratepage(struct address_space *mapping, set_page_pfns(vb->pfns, page); tell_host(vb, vb->deflate_vq); + /* perform vm accountability on this successful page migration */ + count_balloon_event(COMPACTBALLOONMIGRATED); mutex_unlock(&vb->balloon_lock); return 0; }
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 57f7b10..6868aba 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 */ + COMPACTBALLOONRETURNED, /* putback to pagelist, not-migrated */ + COMPACTBALLOONRELEASED, /* old-page released after migration */ +#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 d79f13d..9186000 100644
--- a/mm/balloon_compaction.c
+++ b/mm/balloon_compaction.c@@ -114,6 +114,7 @@ bool isolate_balloon_page(struct page *page) (page_count(page) == 2)) { if (__isolate_balloon_page(page)) { unlock_page(page); + count_vm_event(COMPACTBALLOONISOLATED); return true; } }
@@ -137,9 +138,10 @@ void putback_balloon_page(struct page *page) * concurrent isolation threads attempting to re-isolate it. */ lock_page(page); - if (movable_balloon_page(page)) + if (movable_balloon_page(page)) { __putback_balloon_page(page); - + count_vm_event(COMPACTBALLOONRETURNED); + } unlock_page(page); } #endif /* CONFIG_BALLOON_COMPACTION */
diff --git a/mm/migrate.c b/mm/migrate.c
index 0bf2caf..052e59a 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c@@ -893,6 +893,7 @@ static int unmap_and_move(new_page_t get_new_page, unsigned long private, page_is_file_cache(page)); put_page(page); __free_page(page); + count_balloon_event(COMPACTBALLOONRELEASED); return rc; } out:
diff --git a/mm/vmstat.c b/mm/vmstat.c
index df7a674..c7919c4 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_returned", + "compact_balloon_released", +#endif /* CONFIG_BALLOON_COMPACTION */ + +#endif /* CONFIG_COMPACTION */ #ifdef CONFIG_HUGETLB_PAGE "htlb_buddy_alloc_success",
--
1.7.11.4
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>