diff options
| author | Sridhar Samudrala <sridhar.samudrala@intel.com> | 2017-03-24 10:08:24 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-24 20:49:31 -0700 |
| commit | 7db6b048da3b9f84fe1d22fb29ff7e7c2ec6c0e5 (patch) | |
| tree | 4280f554866625190cd24db1768927764ba2bc77 /net | |
| parent | 37056719bba500d0d2b8216fdf641e5507ec9a0e (diff) | |
| download | linux-7db6b048da3b9f84fe1d22fb29ff7e7c2ec6c0e5.tar.bz2 | |
net: Commonize busy polling code to focus on napi_id instead of socket
Move the core functionality in sk_busy_loop() to napi_busy_loop() and
make it independent of sk.
This enables re-using this function in epoll busy loop implementation.
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/dev.c | 21 | ||||
| -rw-r--r-- | net/core/sock.c | 11 |
2 files changed, 19 insertions, 13 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 2d1b5613b7fd..ef9fe60ee294 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5060,19 +5060,16 @@ static void busy_poll_stop(struct napi_struct *napi, void *have_poll_lock) do_softirq(); } -void sk_busy_loop(struct sock *sk, int nonblock) +void napi_busy_loop(unsigned int napi_id, + bool (*loop_end)(void *, unsigned long), + void *loop_end_arg) { - unsigned long start_time = nonblock ? 0 : busy_loop_current_time(); + unsigned long start_time = loop_end ? busy_loop_current_time() : 0; int (*napi_poll)(struct napi_struct *napi, int budget); void *have_poll_lock = NULL; struct napi_struct *napi; - unsigned int napi_id; restart: - napi_id = READ_ONCE(sk->sk_napi_id); - if (napi_id < MIN_NAPI_ID) - return; - napi_poll = NULL; rcu_read_lock(); @@ -5106,12 +5103,11 @@ restart: trace_napi_poll(napi, work, BUSY_POLL_BUDGET); count: if (work > 0) - __NET_ADD_STATS(sock_net(sk), + __NET_ADD_STATS(dev_net(napi->dev), LINUX_MIB_BUSYPOLLRXPACKETS, work); local_bh_enable(); - if (nonblock || !skb_queue_empty(&sk->sk_receive_queue) || - sk_busy_loop_timeout(sk, start_time)) + if (!loop_end || loop_end(loop_end_arg, start_time)) break; if (unlikely(need_resched())) { @@ -5120,8 +5116,7 @@ count: preempt_enable(); rcu_read_unlock(); cond_resched(); - if (!skb_queue_empty(&sk->sk_receive_queue) || - sk_busy_loop_timeout(sk, start_time)) + if (loop_end(loop_end_arg, start_time)) return; goto restart; } @@ -5133,7 +5128,7 @@ count: out: rcu_read_unlock(); } -EXPORT_SYMBOL(sk_busy_loop); +EXPORT_SYMBOL(napi_busy_loop); #endif /* CONFIG_NET_RX_BUSY_POLL */ diff --git a/net/core/sock.c b/net/core/sock.c index 1b9030ee6f4b..4b762f2a3552 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -3237,3 +3237,14 @@ static int __init proto_init(void) subsys_initcall(proto_init); #endif /* PROC_FS */ + +#ifdef CONFIG_NET_RX_BUSY_POLL +bool sk_busy_loop_end(void *p, unsigned long start_time) +{ + struct sock *sk = p; + + return !skb_queue_empty(&sk->sk_receive_queue) || + sk_busy_loop_timeout(sk, start_time); +} +EXPORT_SYMBOL(sk_busy_loop_end); +#endif /* CONFIG_NET_RX_BUSY_POLL */ |