slub: add missed accounting

With per-cpu partial list, slab is added to partial list first and then moved
to node list. The __slab_free() code path for add/remove_partial is almost
deprecated(except for slub debug). But we forget to account add/remove_partial
when move per-cpu partial pages to node list, so the statistics for such events
are always 0. Add corresponding accounting.

This is against the patch "slub: use correct parameter to add a page to
partial list tail"

Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>

1 files changed, 5 insertions, 2 deletions

diff --git a/mm/slub.c b/mm/slub.c
index 4056d29e6610..8284a206f48d 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1901,11 +1901,14 @@ static void unfreeze_partials(struct kmem_cache *s)
                         }
 
                         if (l != m) {
-                                if (l == M_PARTIAL)
+                                if (l == M_PARTIAL) {
                                         remove_partial(n, page);
-                                else
+                                        stat(s, FREE_REMOVE_PARTIAL);
+                                } else {
                                         add_partial(n, page,
                                                 DEACTIVATE_TO_TAIL);
+                                        stat(s, FREE_ADD_PARTIAL);
+                                }
 
                                 l = m;
                         }