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net: Commonize busy polling code to focus on napi_id instead of socket

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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>
This commit is contained in:
Sridhar Samudrala
2017-03-24 10:08:24 -07:00
committed by David S. Miller
parent 37056719bb
commit 7db6b048da
3 changed files with 34 additions and 18 deletions
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20
include/net/busy_poll.h
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@@ -51,7 +51,11 @@ static inline bool sk_can_busy_loop(const struct sock *sk)
return sk->sk_ll_usec && !signal_pending(current);
}
void sk_busy_loop(struct sock *sk, int nonblock);
bool sk_busy_loop_end(void *p, unsigned long start_time);
void napi_busy_loop(unsigned int napi_id,
bool (*loop_end)(void *, unsigned long),
void *loop_end_arg);
#else /* CONFIG_NET_RX_BUSY_POLL */
static inline unsigned long net_busy_loop_on(void)
@@ -64,10 +68,6 @@ static inline bool sk_can_busy_loop(struct sock *sk)
return false;
}
static inline void sk_busy_loop(struct sock *sk, int nonblock)
{
}
#endif /* CONFIG_NET_RX_BUSY_POLL */
static inline unsigned long busy_loop_current_time(void)
@@ -111,6 +111,16 @@ static inline bool sk_busy_loop_timeout(struct sock *sk,
return true;
}
static inline void sk_busy_loop(struct sock *sk, int nonblock)
{
#ifdef CONFIG_NET_RX_BUSY_POLL
unsigned int napi_id = READ_ONCE(sk->sk_napi_id);
if (napi_id >= MIN_NAPI_ID)
napi_busy_loop(napi_id, nonblock ? NULL : sk_busy_loop_end, sk);
#endif
}
/* used in the NIC receive handler to mark the skb */
static inline void skb_mark_napi_id(struct sk_buff *skb,
struct napi_struct *napi)