aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/sysctl/net.txt17
-rw-r--r--arch/alpha/include/uapi/asm/socket.h2
-rw-r--r--arch/avr32/include/uapi/asm/socket.h2
-rw-r--r--arch/cris/include/uapi/asm/socket.h2
-rw-r--r--arch/frv/include/uapi/asm/socket.h2
-rw-r--r--arch/h8300/include/uapi/asm/socket.h2
-rw-r--r--arch/ia64/include/uapi/asm/socket.h2
-rw-r--r--arch/m32r/include/uapi/asm/socket.h2
-rw-r--r--arch/mips/include/uapi/asm/socket.h2
-rw-r--r--arch/mn10300/include/uapi/asm/socket.h2
-rw-r--r--arch/parisc/include/uapi/asm/socket.h2
-rw-r--r--arch/powerpc/include/uapi/asm/socket.h2
-rw-r--r--arch/s390/include/uapi/asm/socket.h2
-rw-r--r--arch/sparc/include/uapi/asm/socket.h2
-rw-r--r--arch/xtensa/include/uapi/asm/socket.h2
-rw-r--r--include/net/busy_poll.h8
-rw-r--r--include/uapi/asm-generic/socket.h2
-rw-r--r--net/core/sock.c6
-rw-r--r--net/core/sysctl_net_core.c8
-rw-r--r--net/socket.c4
20 files changed, 37 insertions, 36 deletions
diff --git a/Documentation/sysctl/net.txt b/Documentation/sysctl/net.txt
index d69e14c9002cbd..1c15043aaee4c8 100644
--- a/Documentation/sysctl/net.txt
+++ b/Documentation/sysctl/net.txt
@@ -50,26 +50,27 @@ The maximum number of packets that kernel can handle on a NAPI interrupt,
it's a Per-CPU variable.
Default: 64
-low_latency_read
+busy_read
----------------
Low latency busy poll timeout for socket reads. (needs CONFIG_NET_LL_RX_POLL)
Approximate time in us to busy loop waiting for packets on the device queue.
-This sets the default value of the SO_LL socket option.
-Can be set or overridden per socket by setting socket option SO_LL, which is
-the preferred method of enabling.
-If you need to enable the feature globally via sysctl, a value of 50 is recommended.
+This sets the default value of the SO_BUSY_POLL socket option.
+Can be set or overridden per socket by setting socket option SO_BUSY_POLL,
+which is the preferred method of enabling. If you need to enable the feature
+globally via sysctl, a value of 50 is recommended.
Will increase power usage.
Default: 0 (off)
-low_latency_poll
+busy_poll
----------------
Low latency busy poll timeout for poll and select. (needs CONFIG_NET_LL_RX_POLL)
Approximate time in us to busy loop waiting for events.
Recommended value depends on the number of sockets you poll on.
For several sockets 50, for several hundreds 100.
For more than that you probably want to use epoll.
-Note that only sockets with SO_LL set will be busy polled, so you want to either
-selectively set SO_LL on those sockets or set sysctl.net.low_latency_read globally.
+Note that only sockets with SO_BUSY_POLL set will be busy polled,
+so you want to either selectively set SO_BUSY_POLL on those sockets or set
+sysctl.net.busy_read globally.
Will increase power usage.
Default: 0 (off)
diff --git a/arch/alpha/include/uapi/asm/socket.h b/arch/alpha/include/uapi/asm/socket.h
index 4885825e498d75..467de010ea7ee1 100644
--- a/arch/alpha/include/uapi/asm/socket.h
+++ b/arch/alpha/include/uapi/asm/socket.h
@@ -81,6 +81,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/avr32/include/uapi/asm/socket.h b/arch/avr32/include/uapi/asm/socket.h
index 79b61798ebf8ab..11c4259c62fb14 100644
--- a/arch/avr32/include/uapi/asm/socket.h
+++ b/arch/avr32/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* __ASM_AVR32_SOCKET_H */
diff --git a/arch/cris/include/uapi/asm/socket.h b/arch/cris/include/uapi/asm/socket.h
index 47b1ec55092d62..eb723e51554e55 100644
--- a/arch/cris/include/uapi/asm/socket.h
+++ b/arch/cris/include/uapi/asm/socket.h
@@ -76,7 +76,7 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_SOCKET_H */
diff --git a/arch/frv/include/uapi/asm/socket.h b/arch/frv/include/uapi/asm/socket.h
index dbc08520f22c58..f0cb1c3411638e 100644
--- a/arch/frv/include/uapi/asm/socket.h
+++ b/arch/frv/include/uapi/asm/socket.h
@@ -74,7 +74,7 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_SOCKET_H */
diff --git a/arch/h8300/include/uapi/asm/socket.h b/arch/h8300/include/uapi/asm/socket.h
index a38d38a6520bfc..9490758c5e2bac 100644
--- a/arch/h8300/include/uapi/asm/socket.h
+++ b/arch/h8300/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_SOCKET_H */
diff --git a/arch/ia64/include/uapi/asm/socket.h b/arch/ia64/include/uapi/asm/socket.h
index d3358b7606819b..556d0701a15535 100644
--- a/arch/ia64/include/uapi/asm/socket.h
+++ b/arch/ia64/include/uapi/asm/socket.h
@@ -83,6 +83,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_IA64_SOCKET_H */
diff --git a/arch/m32r/include/uapi/asm/socket.h b/arch/m32r/include/uapi/asm/socket.h
index 44aaf4639a4a0c..24be7c8da86ad3 100644
--- a/arch/m32r/include/uapi/asm/socket.h
+++ b/arch/m32r/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_M32R_SOCKET_H */
diff --git a/arch/mips/include/uapi/asm/socket.h b/arch/mips/include/uapi/asm/socket.h
index 6a07992ba6c6b0..61c01f054d1b16 100644
--- a/arch/mips/include/uapi/asm/socket.h
+++ b/arch/mips/include/uapi/asm/socket.h
@@ -92,6 +92,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _UAPI_ASM_SOCKET_H */
diff --git a/arch/mn10300/include/uapi/asm/socket.h b/arch/mn10300/include/uapi/asm/socket.h
index db80fd3e398b8a..e2a2b203eb005b 100644
--- a/arch/mn10300/include/uapi/asm/socket.h
+++ b/arch/mn10300/include/uapi/asm/socket.h
@@ -74,6 +74,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_SOCKET_H */
diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h
index f866fff9a00411..71700e636a8e7b 100644
--- a/arch/parisc/include/uapi/asm/socket.h
+++ b/arch/parisc/include/uapi/asm/socket.h
@@ -73,7 +73,7 @@
#define SO_SELECT_ERR_QUEUE 0x4026
-#define SO_LL 0x4027
+#define SO_BUSY_POLL 0x4027
/* O_NONBLOCK clashes with the bits used for socket types. Therefore we
* have to define SOCK_NONBLOCK to a different value here.
diff --git a/arch/powerpc/include/uapi/asm/socket.h b/arch/powerpc/include/uapi/asm/socket.h
index 405fb09bda9418..a6d74467c9edb4 100644
--- a/arch/powerpc/include/uapi/asm/socket.h
+++ b/arch/powerpc/include/uapi/asm/socket.h
@@ -81,6 +81,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_POWERPC_SOCKET_H */
diff --git a/arch/s390/include/uapi/asm/socket.h b/arch/s390/include/uapi/asm/socket.h
index 0c5105fbaaf335..92494494692eca 100644
--- a/arch/s390/include/uapi/asm/socket.h
+++ b/arch/s390/include/uapi/asm/socket.h
@@ -80,6 +80,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _ASM_SOCKET_H */
diff --git a/arch/sparc/include/uapi/asm/socket.h b/arch/sparc/include/uapi/asm/socket.h
index b46c3fa0b2653f..4e1d66c3ce71b0 100644
--- a/arch/sparc/include/uapi/asm/socket.h
+++ b/arch/sparc/include/uapi/asm/socket.h
@@ -70,7 +70,7 @@
#define SO_SELECT_ERR_QUEUE 0x0029
-#define SO_LL 0x0030
+#define SO_BUSY_POLL 0x0030
/* Security levels - as per NRL IPv6 - don't actually do anything */
#define SO_SECURITY_AUTHENTICATION 0x5001
diff --git a/arch/xtensa/include/uapi/asm/socket.h b/arch/xtensa/include/uapi/asm/socket.h
index b21ace4fc9bab0..c114483010c13b 100644
--- a/arch/xtensa/include/uapi/asm/socket.h
+++ b/arch/xtensa/include/uapi/asm/socket.h
@@ -85,6 +85,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* _XTENSA_SOCKET_H */
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index 4ff71908fd42de..a14339c2985ff0 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -30,8 +30,8 @@
#ifdef CONFIG_NET_LL_RX_POLL
struct napi_struct;
-extern unsigned int sysctl_net_ll_read __read_mostly;
-extern unsigned int sysctl_net_ll_poll __read_mostly;
+extern unsigned int sysctl_net_busy_read __read_mostly;
+extern unsigned int sysctl_net_busy_poll __read_mostly;
/* return values from ndo_ll_poll */
#define LL_FLUSH_FAILED -1
@@ -39,7 +39,7 @@ extern unsigned int sysctl_net_ll_poll __read_mostly;
static inline bool net_busy_loop_on(void)
{
- return sysctl_net_ll_poll;
+ return sysctl_net_busy_poll;
}
/* a wrapper to make debug_smp_processor_id() happy
@@ -72,7 +72,7 @@ static inline unsigned long sk_busy_loop_end_time(struct sock *sk)
/* in poll/select we use the global sysctl_net_ll_poll value */
static inline unsigned long busy_loop_end_time(void)
{
- return busy_loop_us_clock() + ACCESS_ONCE(sysctl_net_ll_poll);
+ return busy_loop_us_clock() + ACCESS_ONCE(sysctl_net_busy_poll);
}
static inline bool sk_can_busy_loop(struct sock *sk)
diff --git a/include/uapi/asm-generic/socket.h b/include/uapi/asm-generic/socket.h
index ca3a20d772ac7f..f04b69b6abf251 100644
--- a/include/uapi/asm-generic/socket.h
+++ b/include/uapi/asm-generic/socket.h
@@ -76,6 +76,6 @@
#define SO_SELECT_ERR_QUEUE 45
-#define SO_LL 46
+#define SO_BUSY_POLL 46
#endif /* __ASM_GENERIC_SOCKET_H */
diff --git a/net/core/sock.c b/net/core/sock.c
index 9bfe83f4d670c8..548d716c5f62ac 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -901,7 +901,7 @@ set_rcvbuf:
break;
#ifdef CONFIG_NET_LL_RX_POLL
- case SO_LL:
+ case SO_BUSY_POLL:
/* allow unprivileged users to decrease the value */
if ((val > sk->sk_ll_usec) && !capable(CAP_NET_ADMIN))
ret = -EPERM;
@@ -1171,7 +1171,7 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
break;
#ifdef CONFIG_NET_LL_RX_POLL
- case SO_LL:
+ case SO_BUSY_POLL:
v.val = sk->sk_ll_usec;
break;
#endif
@@ -2294,7 +2294,7 @@ void sock_init_data(struct socket *sock, struct sock *sk)
#ifdef CONFIG_NET_LL_RX_POLL
sk->sk_napi_id = 0;
- sk->sk_ll_usec = sysctl_net_ll_read;
+ sk->sk_ll_usec = sysctl_net_busy_read;
#endif
/*
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 1a298cb3daee84..66096861663797 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -300,15 +300,15 @@ static struct ctl_table net_core_table[] = {
#endif /* CONFIG_NET_FLOW_LIMIT */
#ifdef CONFIG_NET_LL_RX_POLL
{
- .procname = "low_latency_poll",
- .data = &sysctl_net_ll_poll,
+ .procname = "busy_poll",
+ .data = &sysctl_net_busy_poll,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec
},
{
- .procname = "low_latency_read",
- .data = &sysctl_net_ll_read,
+ .procname = "busy_read",
+ .data = &sysctl_net_busy_read,
.maxlen = sizeof(unsigned int),
.mode = 0644,
.proc_handler = proc_dointvec
diff --git a/net/socket.c b/net/socket.c
index 6a3e9a3f50ad66..829b460acb87e6 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -107,8 +107,8 @@
#include <net/busy_poll.h>
#ifdef CONFIG_NET_LL_RX_POLL
-unsigned int sysctl_net_ll_read __read_mostly;
-unsigned int sysctl_net_ll_poll __read_mostly;
+unsigned int sysctl_net_busy_read __read_mostly;
+unsigned int sysctl_net_busy_poll __read_mostly;
#endif
static int sock_no_open(struct inode *irrelevant, struct file *dontcare);
generated by cgit 1.2.3-korg (git 2.43.0) at 2025-12-13 07:04:43 +0000