Move clearing of objects outside IRQ disabled section,
to minimize time spend with local IRQs off.
Signed-off-by: Jesper Dangaard Brouer <bro...@redhat.com>
---
mm/slub.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
index d10de5a33c03..26f64005a347 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2781,13 +2781,18 @@ bool kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t
flags, size_t size,
c->freelist = get_freepointer(s, object);
p[i] = object;
-
- if (unlikely(flags & __GFP_ZERO))
- memset(object, 0, s->object_size);
}
c->tid = next_tid(c->tid);
local_irq_enable();
+ /* Clear memory outside IRQ disabled fastpath loop */
+ if (unlikely(flags & __GFP_ZERO)) {
+ int j;
+
+ for (j = 0; j < i; j++)
+ memset(p[j], 0, s->object_size);
+ }
+
/* Fallback to single elem alloc */
for (; i < size; i++) {
void *x = p[i] = kmem_cache_alloc(s, flags);
--
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