slab: remove one NR_CPUS dependency
Reduce high order allocations in do_tune_cpucache() for some setups.
(NR_CPUS=4096 -> we need 64KB)
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
diff --git a/mm/slab.c b/mm/slab.c
index 1e523ed..b80282a 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3934,7 +3934,7 @@
struct ccupdate_struct {
struct kmem_cache *cachep;
- struct array_cache *new[NR_CPUS];
+ struct array_cache *new[0];
};
static void do_ccupdate_local(void *info)
@@ -3956,7 +3956,8 @@
struct ccupdate_struct *new;
int i;
- new = kzalloc(sizeof(*new), gfp);
+ new = kzalloc(sizeof(*new) + nr_cpu_ids * sizeof(struct array_cache *),
+ gfp);
if (!new)
return -ENOMEM;