Hi, I've had some problems with 2.6.20 (but also with earlier kernels, like Debian's 2.6.18) where one of the users on our system, running a Java6 application, is somehow able to make the userspace on the machine totally unresponsive, denying all remote _and_ local access to the machine.
- The AMD64 port of Linux and Java are in use - The process runs as an unprivileged user - The OOM killer doesn't kick in - No swap is enabled on the machine - I'm told that the program doesn't fork bomb (but I've not got a reproducible test case yet) - The program is able to deny service even to a getty login. If I SAK the machine, init respawns getty and everything is fine again. [EMAIL PROTECTED]:~$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited max nice (-e) 0 file size (blocks, -f) unlimited pending signals (-i) unlimited max locked memory (kbytes, -l) 1000 max memory size (kbytes, -m) 1000 open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) unlimited max rt priority (-r) 0 stack size (kbytes, -s) 2048 cpu time (seconds, -t) unlimited max user processes (-u) 100 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited Any ideas with how to proceed for debugging this issue? -- Cheers, Alistair. Final year Computer Science undergraduate. 1F2 55 South Clerk Street, Edinburgh, UK. - 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/
