Hello colleagues, We have a strange problem with our multi-threaded SMTP client: at very heavy load (e.g. 150 threads, each with a pool of 5 persistent connections) it sometimes receives SIGSEGV while making network kernel calls (mostly in "recvfrom" for both TCP and UDP, but also in "connect"). This happens for both 2.2.12 and 2.4.4 kernels on a Celeron 600 machine (no SMP) with glibc 2.1.3. The kernel logs do not show any problems, yet the application program gets killed. This happens MORE frequently if we increase the number of file descriptors available to the process (using "ulimit -n"), which suggests some resource utilisation problem in the kernel (?) E.g., is there a compiled-in upper bound on the total number of sockets which can be created by all processes? (I could not find SOCK_ARRAY_SIZE in 2.4.4). Any ideas would be very much appreciated. Thank you very much in advance, Dr. Leonid A. Timochouk Computing Laboratory University of Kent at Canterbury - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
