diff options
| author | Alexander Duyck <alexander.h.duyck@intel.com> | 2017-03-24 10:08:18 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-03-24 20:49:31 -0700 |
| commit | 37056719bba500d0d2b8216fdf641e5507ec9a0e (patch) | |
| tree | cb29ca52bc837c095ee470e8caf6410af54f9b03 /net/core | |
| parent | 2b5cd0dfa384242f78a396b90087368c9440cc9a (diff) | |
| download | linux-37056719bba500d0d2b8216fdf641e5507ec9a0e.tar.gz | |
net: Track start of busy loop instead of when it should end
This patch flips the logic we were using to determine if the busy polling has timed out. The main motivation for this is that we will need to support two different possible timeout values in the future and by recording the start time rather than when we would want to end we can focus on making the end_time specific to the task be it epoll or socket based polling. 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/core')
| -rw-r--r-- | net/core/dev.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index af70eb6ba682..2d1b5613b7fd 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5062,7 +5062,7 @@ static void busy_poll_stop(struct napi_struct *napi, void *have_poll_lock) void sk_busy_loop(struct sock *sk, int nonblock) { - unsigned long end_time = !nonblock ? sk_busy_loop_end_time(sk) : 0; + unsigned long start_time = nonblock ? 0 : busy_loop_current_time(); int (*napi_poll)(struct napi_struct *napi, int budget); void *have_poll_lock = NULL; struct napi_struct *napi; @@ -5111,7 +5111,7 @@ count: local_bh_enable(); if (nonblock || !skb_queue_empty(&sk->sk_receive_queue) || - busy_loop_timeout(end_time)) + sk_busy_loop_timeout(sk, start_time)) break; if (unlikely(need_resched())) { @@ -5121,7 +5121,7 @@ count: rcu_read_unlock(); cond_resched(); if (!skb_queue_empty(&sk->sk_receive_queue) || - busy_loop_timeout(end_time)) + sk_busy_loop_timeout(sk, start_time)) return; goto restart; } |