By: Yu Feng

Yu Feng — Fri, 24 Sep 2010 05:15:31 +0000

[root@localhost ~]# cat test.stp
global tmp=0
probe kernel.function("do_tcp_setsockopt")
{
        if(!tmp) next;

        $sysctl_tcp_fin_timeout=tmp;
        printf("done, sysctl_tcp_fin_timeout=%d\n", $sysctl_tcp_fin_timeout);
        exit();
}

probe procfs("sysctl_tcp_fin_timeout").write
{
        tmp=strtol($value, 10);
        printf("sysctl_tcp_fin_timeout will be set to %d\n", tmp);
}

[root@localhost ~]# stap -m test -g test.stp

#在另外的shell下运行
[root@localhost ~]# echo 18000>/proc/systemtap/test/sysctl_tcp_fin_timeout

Comments on: 用systemtap来修改下linux内核变量的值

By: Yu Feng