diff options
| -rw-r--r-- | kernel/fork.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/kernel/fork.c b/kernel/fork.c index 5fd893c907a5..6616d173307a 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -201,6 +201,12 @@ static inline void free_task_struct(struct task_struct *tsk) */ #define NR_CACHED_STACKS 2 static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]); +/* + * Allocated stacks are cached and later reused by new threads, so memcg + * accounting is performed by the code assigning/releasing stacks to tasks. + * We need a zeroed memory without __GFP_ACCOUNT. + */ +#define GFP_VMAP_STACK (GFP_KERNEL | __GFP_ZERO) struct vm_stack { struct rcu_head rcu; @@ -307,13 +313,8 @@ static int alloc_thread_stack_node(struct task_struct *tsk, int node) return 0; } - /* - * Allocated stacks are cached and later reused by new threads, - * so memcg accounting is performed manually on assigning/releasing - * stacks to tasks. Drop __GFP_ACCOUNT. - */ stack = __vmalloc_node(THREAD_SIZE, THREAD_ALIGN, - THREADINFO_GFP & ~__GFP_ACCOUNT, + GFP_VMAP_STACK, node, __builtin_return_address(0)); if (!stack) return -ENOMEM; |