hi @madeye ,
i am trying to install this module, but i am getting the following error:
"no rule to make target modules stop"
i am using debian 10 buster Linux 4.19.0-9-amd64

edit : i think i figured out the above error but still i am getting :
home/debian/tcp_china/tcp_china.c:254:16: error: initialization of ‘void (*)(struct sock *, const struct ack_sample )’ from incompatible pointer type ‘void ()(struct sock , u32, s32)’ {aka ‘void ()(struct sock *, unsigned int, int)’} [-Werror=incompatible-pointer-types]
.pkts_acked = tcp_china_rtt_calc,
^~~~~~~~~~~~~~~~~~
/home/debian/tcp_china/tcp_china.c:254:16: note: (near initialization for ‘tcp_china.pkts_acked’)

我对编译陌生些,如何在ubuntu 19.10 最新核心下编译?

~/tcp_china-master# make
make -C /lib/modules/5.4.8-050408-lowlatency/build M=/root/tcp_china-master modules
make[1]: Entering directory '/usr/src/linux-headers-5.4.8-050408-lowlatency'
CC [M] /root/tcp_china-master/tcp_china.o
/root/tcp_china-master/tcp_china.c:254:16: error: initialization of ‘void (*)(struct sock *, const struct ack_sample )’ from incompatible pointer type ‘void ()(struct sock , u32, s32)’ {aka ‘void ()(struct sock *, unsigned int, int)’} [-Werror=incompatible-pointer-types]
254 | .pkts_acked = tcp_china_rtt_calc,
| ^~~~~~~~~~~~~~~~~~
/root/tcp_china-master/tcp_china.c:254:16: note: (near initialization for ‘tcp_china.pkts_acked’)
cc1: some warnings being treated as errors
make[2]: *** [scripts/Makefile.build:266: /root/tcp_china-master/tcp_china.o] Error 1
make[1]: *** [Makefile:1652: /root/tcp_china-master] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.4.8-050408-lowlatency'
make: *** [Makefile:4: all] Error 2

Hello:
I get "No such file or directory" while setting "net.ipv4.tcp_available_congestion_control".
net.ipv4.tcp_congestion_control = "china"

I am sure the modules has been loaded:

then I run sysctl net.ipv4.tcp_available_congestion_control and get:

it seems that tcp_china fail to register in the system?

• OS: centos7 x64
• kernel: 4.11.8-1.el7.elrepo.x86_64

i met some matter like this:

root@debian:/home/ha# make
make -C /lib/modules/`uname -r`/build M=`pwd` modules
make[1]: Entering directory '/usr/src/linux-headers-4.10.2-041002-lowlatency'
CC [M]  /home/ha/tcp_china.o
/home/ha/tcp_china.c:249:2: warning: initialization from incompatible pointer type
.pkts_acked = tcp_china_rtt_calc,
/home/ha/tcp_china.c:249:2: warning: (near initialization for ‘tcp_china.pkts_acked’)
Building modules, stage 2.
MODPOST 1 modules
CC /home/ha/tcp_china.mod.o
LD [M]  /home/ha/tcp_china.ko
make[1]: Leaving directory '/usr/src/linux-headers-4.10.2-041002-lowlatency'

system is debian 8
like in this section, i tried several times and changed my linux server, it doesn't make sense
there is always warning:
warning: initialization from incompatible pointer type .pkts_acked = tcp_china_rtt_calc
and
warning: (near initialization for ‘tcp_china.pkts_acked’)
i knew nothing about congestion control, so could you solve me, thank you