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authorSridhar Samudrala <sridhar.samudrala@intel.com>2017-03-24 20:08:24 +0300
committerDavid S. Miller <davem@davemloft.net>2017-03-25 06:49:31 +0300
commit7db6b048da3b9f84fe1d22fb29ff7e7c2ec6c0e5 (patch)
tree4280f554866625190cd24db1768927764ba2bc77 /include/net/busy_poll.h
parent37056719bba500d0d2b8216fdf641e5507ec9a0e (diff)
downloadlinux-7db6b048da3b9f84fe1d22fb29ff7e7c2ec6c0e5.tar.xz
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 'include/net/busy_poll.h')
-rw-r--r--include/net/busy_poll.h20
1 files changed, 15 insertions, 5 deletions
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index 72c82f2ea536..8ffd434676b7 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -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)