Messages in this thread Patch in this message | | | From | Miaohe Lin <> | Subject | [PATCH 2/5] mm, memcg: narrow the scope of percpu_charge_mutex | Date | Thu, 29 Jul 2021 20:57:52 +0800 |
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Since percpu_charge_mutex is only used inside drain_all_stock(), we can narrow the scope of percpu_charge_mutex by moving it here.
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6580c2381a3e..a03e24e57cd9 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2050,7 +2050,6 @@ struct memcg_stock_pcp { #define FLUSHING_CACHED_CHARGE 0 }; static DEFINE_PER_CPU(struct memcg_stock_pcp, memcg_stock); -static DEFINE_MUTEX(percpu_charge_mutex); #ifdef CONFIG_MEMCG_KMEM static void drain_obj_stock(struct obj_stock *stock); @@ -2209,6 +2208,7 @@ static void refill_stock(struct mem_cgroup *memcg, unsigned int nr_pages) */ static void drain_all_stock(struct mem_cgroup *root_memcg) { + static DEFINE_MUTEX(percpu_charge_mutex); int cpu, curcpu; /* If someone's already draining, avoid adding running more workers. */ -- 2.23.0
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