From: Jianfeng Wang <jianfeng.w.wang@oracle.com> mainline inclusion from mainline-v6.10-rc1 commit b3d8a8e870144369fdbcbb1a78878ce98532265a category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAM1MT CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i... ------------------------------------------- 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: Jianfeng Wang <jianfeng.w.wang@oracle.com> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Jinjiang Tu <tujinjiang@huawei.com> --- mm/slub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/slub.c b/mm/slub.c index 63a99c485b6b..03b1137df088 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2465,7 +2465,7 @@ 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); -- 2.25.1