On Mon, May 7, 2012 at 10:15 PM, Christoph Lameter <cl@xxxxxxxxx> wrote: > On Mon, 7 May 2012, Robert Święcki wrote: > >> root@ise-test:~/kern-fuz# ./cont.sh >> su: Cannot fork user shell >> su: Cannot fork user shell >> su: Cannot fork user shell >> >> root@ise-test:~/kern-fuz# strace -e mmap,clone su test -c 'kill -CONT >> -1' 2>&1 | grep "= \-1" >> clone(child_stack=0, >> flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, >> child_tidptr=0x7fadf334f9f0) = -1 ENOMEM (Cannot allocate memory) >> mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, >> 0) = -1 ENOMEM (Cannot allocate memory) > > Hmmm... That looks like some maximum virtual memory limit was violated. > > Check ulimit and the overcommit settings (see /proc/meminfo's commitlimit > etc) Yup (btw: I attached dump of some proc files and some debug commands in the original e-mail - can be found here http://marc.info/?l=linux-kernel&m=133640623421007&w=2 in case some MTA removed them) CommitLimit: 1981528 kB Committed_AS: 1916788 kB just not sure if Committed_AS should present this kind of value. Did I just hit a legitimate condition, or may it suggest a bug? I'm a bit puzzled cause root@ise-test:/proc# grep Mem /proc/meminfo MemTotal: 3963060 kB MemFree: 3098324 kB Also, some sysctl values: vm.overcommit_memory = 2 vm.overcommit_ratio = 50 -- Robert Święcki -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href