[RFC v2 24/34] mm, slub: detach whole partial list at once in unfreeze_partials()
From: Vlastimil Babka <hidden>
Date: 2021-06-09 11:40:53
Also in:
lkml
Subsystem:
memory management, slab allocator, the rest · Maintainers:
Andrew Morton, Vlastimil Babka, Harry Yoo, Linus Torvalds
Instead of iterating through the live percpu partial list, detach it from the kmem_cache_cpu at once. This is simpler and will allow further optimization. Signed-off-by: Vlastimil Babka <redacted> --- mm/slub.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index dcbc5baea702..3e0ec7211d55 100644
--- a/mm/slub.c
+++ b/mm/slub.c@@ -2298,16 +2298,20 @@ static void unfreeze_partials(struct kmem_cache *s, { #ifdef CONFIG_SLUB_CPU_PARTIAL struct kmem_cache_node *n = NULL, *n2 = NULL; - struct page *page, *discard_page = NULL; + struct page *page, *partial_page, *discard_page = NULL; unsigned long flags; local_irq_save(flags); - while ((page = slub_percpu_partial(c))) { + partial_page = slub_percpu_partial(c); + c->partial = NULL; + + while (partial_page) { struct page new; struct page old; - slub_set_percpu_partial(c, page); + page = partial_page; + partial_page = page->next; n2 = get_node(s, page_to_nid(page)); if (n != n2) {
--
2.31.1