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| author | Dust Li <dust.li@linux.alibaba.com> | 2022-03-01 17:43:58 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-03-01 14:25:12 +0000 |
| commit | 12bbb0d163a90d81a2677cf7808d364697290207 (patch) | |
| tree | cc1b0752c04cca5ee363f20aba99b404ef6e3161 /Documentation/networking/smc-sysctl.rst | |
| parent | dcd2cf5f2fc0d4d37aa5400b308d401a150c38b6 (diff) | |
| download | linux-12bbb0d163a90d81a2677cf7808d364697290207.tar.bz2 | |
net/smc: add sysctl for autocorking
This add a new sysctl: net.smc.autocorking_size
We can dynamically change the behaviour of autocorking
by change the value of autocorking_size.
Setting to 0 disables autocorking in SMC
Signed-off-by: Dust Li <dust.li@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking/smc-sysctl.rst')
| -rw-r--r-- | Documentation/networking/smc-sysctl.rst | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/Documentation/networking/smc-sysctl.rst b/Documentation/networking/smc-sysctl.rst new file mode 100644 index 000000000000..c53f8c61c9e4 --- /dev/null +++ b/Documentation/networking/smc-sysctl.rst @@ -0,0 +1,23 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========= +SMC Sysctl +========= + +/proc/sys/net/smc/* Variables +============================== + +autocorking_size - INTEGER + Setting SMC auto corking size: + SMC auto corking is like TCP auto corking from the application's + perspective of view. When applications do consecutive small + write()/sendmsg() system calls, we try to coalesce these small writes + as much as possible, to lower total amount of CDC and RDMA Write been + sent. + autocorking_size limits the maximum corked bytes that can be sent to + the under device in 1 single sending. If set to 0, the SMC auto corking + is disabled. + Applications can still use TCP_CORK for optimal behavior when they + know how/when to uncork their sockets. + + Default: 64K |