This patch is only for testing report purposes and shall be dropped in case of
the rest of this patchset getting accepted for merging.
Signed-off-by: Rafael Aquini <aquini@xxxxxxxxxx>
---
drivers/virtio/virtio_balloon.c | 1 +
include/linux/vm_event_item.h | 2 ++
mm/compaction.c | 1 +
mm/migrate.c | 6 ++++--
mm/vmstat.c | 4 ++++
5 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c
index 7c937a0..b8f7ea5 100644
--- a/drivers/virtio/virtio_balloon.c
+++ b/drivers/virtio/virtio_balloon.c
@@ -414,6 +414,7 @@ int virtballoon_migratepage(struct address_space *mapping,
mutex_unlock(&balloon_lock);
+ count_vm_event(COMPACTBALLOONMIGRATED);
return 0;
}
diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 57f7b10..a632a5d 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -41,6 +41,8 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
#ifdef CONFIG_COMPACTION
COMPACTBLOCKS, COMPACTPAGES, COMPACTPAGEFAILED,
COMPACTSTALL, COMPACTFAIL, COMPACTSUCCESS,
+ COMPACTBALLOONMIGRATED, COMPACTBALLOONFAILED,
+ COMPACTBALLOONISOLATED, COMPACTBALLOONFREED,
#endif
#ifdef CONFIG_HUGETLB_PAGE
HTLB_BUDDY_PGALLOC, HTLB_BUDDY_PGALLOC_FAIL,
diff --git a/mm/compaction.c b/mm/compaction.c
index 9499d85..4e2e46a 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -76,6 +76,7 @@ bool isolate_balloon_page(struct page *page)
if (is_balloon_page(page) && (page_count(page) == 2)) {
__isolate_balloon_page(page);
unlock_page(page);
+ count_vm_event(COMPACTBALLOONISOLATED);
return true;
}
unlock_page(page);
diff --git a/mm/migrate.c b/mm/migrate.c
index fc56968..f98804a 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -80,9 +80,10 @@ void putback_lru_pages(struct list_head *l)
dec_zone_page_state(page, NR_ISOLATED_ANON +
page_is_file_cache(page));
if (unlikely(is_balloon_page(page) &&
- balloon_compaction_enabled()))
+ balloon_compaction_enabled())) {
+ count_vm_event(COMPACTBALLOONFAILED);
WARN_ON(!putback_balloon_page(page));
- else
+ } else
putback_lru_page(page);
}
}
@@ -874,6 +875,7 @@ 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_vm_event(COMPACTBALLOONFREED);
return rc;
}
out:
diff --git a/mm/vmstat.c b/mm/vmstat.c
index df7a674..8d80f60 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -768,6 +768,10 @@ const char * const vmstat_text[] = {
"compact_stall",
"compact_fail",
"compact_success",
+ "compact_balloon_migrated",
+ "compact_balloon_failed",
+ "compact_balloon_isolated",
+ "compact_balloon_freed",
#endif
#ifdef CONFIG_HUGETLB_PAGE
--
1.7.11.2
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