[RFC v2 26/34] mm, slub: only disable irq with spin_lock in __unfreeze_partials()
From: Vlastimil Babka <hidden>
Date: 2021-06-09 11:41:43
Also in:
lkml
Subsystem:
memory management, slab allocator, the rest · Maintainers:
Andrew Morton, Vlastimil Babka, Harry Yoo, Linus Torvalds
__unfreeze_partials() no longer needs to have irqs disabled, except for making the spin_lock operations irq-safe, so convert the spin_locks operations and remove the separate irq handling. Signed-off-by: Vlastimil Babka <redacted> --- mm/slub.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index 0867801e3086..5a81189608e6 100644
--- a/mm/slub.c
+++ b/mm/slub.c@@ -2292,9 +2292,7 @@ static void __unfreeze_partials(struct kmem_cache *s, struct page *partial_page) { struct kmem_cache_node *n = NULL, *n2 = NULL; struct page *page, *discard_page = NULL; - unsigned long flags; - - local_irq_save(flags); + unsigned long flags = 0; while (partial_page) { struct page new;
@@ -2306,10 +2304,10 @@ static void __unfreeze_partials(struct kmem_cache *s, struct page *partial_page) n2 = get_node(s, page_to_nid(page)); if (n != n2) { if (n) - spin_unlock(&n->list_lock); + spin_unlock_irqrestore(&n->list_lock, flags); n = n2; - spin_lock(&n->list_lock); + spin_lock_irqsave(&n->list_lock, flags); } do {
@@ -2338,9 +2336,7 @@ static void __unfreeze_partials(struct kmem_cache *s, struct page *partial_page) } if (n) - spin_unlock(&n->list_lock); - - local_irq_restore(flags); + spin_unlock_irqrestore(&n->list_lock, flags); while (discard_page) { page = discard_page;
--
2.31.1