Hang in send() to a socket
Hi. I'm testing a program to send files thru a TCP socket on an MPC5200. The program itself is quite simple: reads block from file, adds headers for a custom protocol, and sends the packet to the socket. This works without problems on x86 architecture, but in PPC, the programs stops forever in one of the writings to the socket after having sent a random number of packets. Strace says that it stops on a send(), and netstat shows that the connection is stablished, and stays this way: Proto Recv-Q Send-Q Local Address Foreign Address State tcp0 63903 160.100.100.169:12700 160.100.100.189:41097 ESTABLISHED Until the kernel destroys the socket. The program isn't hanged, and it detects when the socket closes (Connection timed out) if you wait enough, and exits properly. It just stops in send(). Is there any know problem with this on the MPC5200? The platform is a Lite5200, and kernel linuxppc_2_4_devel from Denx CVS. Thanks I?igo ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
MPC5200, Hang in send() to a socket
[ I?igo Lopez Barranco writes: ] Hi. I'm testing a program to send files thru a TCP socket on an MPC5200. programs stops forever in one of the writings to the socket after having sent a random number of packets. Strace says that it stops on a send(), and netstat shows that the connection is stablished, and stays this way: I see this problem too during a FTP put operation. The network remains up as a concurrently executing ping has no problem and I can restart the FTP transfer which will happily transfer an random number of packets before halting again. I also noticed a nasty memory leak associated with this -- if I rerun the FTP transfer enough times the system will run out of memory. It may be related to lost RX packets. The RX error count seen from ifconfig adds up very quickly on a put. FTP get doesn't provoke this bug nearly as much. I'm looking into the driver, though I am quite unfamiliar with Linux networking kernel code. -- David Wolfe Digital Audio, Radio Telematics Freescale Semiconductor ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
