This patch introduces a new set of vm event counters to keep track of ballooned pages compaction activity. Signed-off-by: Rafael Aquini <aquini@xxxxxxxxxx> --- 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 9b0bc46..e1e8e30 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -528,6 +528,7 @@ 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 86a3692..00e7ea9 100644 --- a/mm/balloon_compaction.c +++ b/mm/balloon_compaction.c @@ -110,6 +110,7 @@ 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; } else if (unlikely(!__is_movable_balloon_page(page))) { @@ -139,6 +140,7 @@ 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 { dump_page(page); __WARN(); 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx"> email@xxxxxxxxx </a>