Hello, kernel_sendmsg fails with error EAGAIN, yet I no matter how long I try, I still get the same error and do not see the send buffer size of a socket changing (increasing) The initial buffer sizes are 16384 for send side and 87380 for the receive side but I see receive side buffer tuning but do not see the same with send side. If tcp does not see a need to increase the send buffer size, wonder why I get EAGAIN error on this non-blocking socket for kernel_sendmsg! I do subscribe to this mailing list so, please send your responses to this mail address. Regards, Shirish -------------------------------------------------------------------------------------------------- uname -r 2.6.18-91.el5 sysctl -a net.ipv4.tcp_rmem = 4096 87380 4194304 net.ipv4.tcp_wmem = 4096 16384 4194304 net.ipv4.tcp_mem = 98304 131072 196608 net.core.rmem_default = 126976 net.core.wmem_default = 126976 net.core.rmem_max = 131071 net.core.wmem_max = 131071 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_timestamps = 1 net.ipv4.tcp_moderate_rcvbuf = 1 cat /proc/sys/net/ipv4/tcp_moderate_rcvbuf 1 CIFS VFS: sndbuf 16384 rcvbuf 87380 CIFS VFS: sends on sock 0000000009903100, sendbuf 34776, rcvbuf 190080 stuck for 32 seconds, error: -11 CIFS VFS: sends on sock 0000000009903a00, sndbuf 34776, rcvbuf 138240 stuck for 32 seconds, error: -11 CIFS VFS: sends on sock 0000000009903100, sndbuf 34776, rcvbuf 126720 stuck for 64 seconds, error: -11 CIFS VFS: sends on sock 0000000009903100, sndbuf 34776, rcvbuf 222720 stuck for 256 seconds, error: -11 I see the socket receive buffer size fluctuating (tcp_moderate_rcvbuf is 1) but not the socket send buffer size. The send buffer size remains fixed, the auto-tuning for send side is enabled by default,so I do not see it happening here no matter how long the c ode tries to kernel_sendmsg after receiving EAGAIN return code. -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
