diff options
| author | Björn Töpel <bjorn.topel@intel.com> | 2020-11-30 21:51:57 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-12-01 02:09:25 +0300 |
| commit | 7c951cafc0cb2e575f1d58677b95ac387ac0a5bd (patch) | |
| tree | 1d47f6c2fb6e3734d52c96a1f0abcf38e2c08cf5 /include/net/busy_poll.h | |
| parent | 7fd3253a7de6a317a0683f83739479fb880bffc8 (diff) | |
| download | linux-7c951cafc0cb2e575f1d58677b95ac387ac0a5bd.tar.xz | |
net: Add SO_BUSY_POLL_BUDGET socket option
This option lets a user set a per socket NAPI budget for
busy-polling. If the options is not set, it will use the default of 8.
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/bpf/20201130185205.196029-3-bjorn.topel@gmail.com
Diffstat (limited to 'include/net/busy_poll.h')
| -rw-r--r-- | include/net/busy_poll.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h index 0292b8353d7e..2f8f51807b83 100644 --- a/include/net/busy_poll.h +++ b/include/net/busy_poll.h @@ -23,6 +23,8 @@ */ #define MIN_NAPI_ID ((unsigned int)(NR_CPUS + 1)) +#define BUSY_POLL_BUDGET 8 + #ifdef CONFIG_NET_RX_BUSY_POLL struct napi_struct; @@ -43,7 +45,7 @@ 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, bool prefer_busy_poll); + void *loop_end_arg, bool prefer_busy_poll, u16 budget); #else /* CONFIG_NET_RX_BUSY_POLL */ static inline unsigned long net_busy_loop_on(void) @@ -106,7 +108,8 @@ static inline void sk_busy_loop(struct sock *sk, int nonblock) if (napi_id >= MIN_NAPI_ID) napi_busy_loop(napi_id, nonblock ? NULL : sk_busy_loop_end, sk, - READ_ONCE(sk->sk_prefer_busy_poll)); + READ_ONCE(sk->sk_prefer_busy_poll), + READ_ONCE(sk->sk_busy_poll_budget) ?: BUSY_POLL_BUDGET); #endif } |