Commit b3d8a8e8 authored by Jianfeng Wang's avatar Jianfeng Wang Committed by Vlastimil Babka
Browse files

slub: use count_partial_free_approx() in slab_out_of_memory() 



slab_out_of_memory() uses count_partial() to get the exact count
of free objects for each node. As it may get called in the slab
allocation path, count_partial_free_approx() can be used to avoid
the risk and overhead of traversing a long partial slab list.

At the same time, show_slab_objects() still uses count_partial().
Thus, slub users can still have the option to access the exact
count of objects via sysfs if the overhead is acceptable to them.

Signed-off-by: default avatarJianfeng Wang <jianfeng.w.wang@oracle.com>
Acked-by: default avatarDavid Rientjes <rientjes@google.com>
Signed-off-by: default avatarVlastimil Babka <vbabka@suse.cz>
parent 046f4c69

mm/slub.c

+1 −1
Original line number Diff line number Diff line
@@ -3301,7 +3301,7 @@ slab_out_of_memory(struct kmem_cache *s, gfp_t gfpflags, int nid) 
		unsigned long nr_objs;

		unsigned long nr_free;



		nr_free  = count_partial(n, count_free);

		nr_free  = count_partial_free_approx(n);

		nr_slabs = node_nr_slabs(n);

		nr_objs  = node_nr_objs(n);