Michal, >> I'm unable to send you stacks or more info because problem is taking >> down the whole server for some time now (don't know what exactly >> caused it to start happening, maybe newer versions of 3.2.x). > >So you are not testing with the same kernel with just the old patch >replaced by the new one? No, i'm not testing with the same kernel but all are 3.2.x. I even cannot install older 3.2.x because grsecurity is always available for newest kernel and there is no archive of older versions (at least i don't know about any). >> But i'm sure of one thing - when problem occurs, nothing is able to >> access hard drives (every process which tries it is freezed until >> problem is resolved or server is rebooted). > >I would be really interesting to see what those tasks are blocked on. I'm trying to get it, stay tuned :) Today i noticed one bug, not 100% sure it is related to 'your' patch but i didn't seen this before. I noticed that i have lots of cgroups which cannot be removed - if i do 'rmdir <cgroup_directory>', it just hangs and never complete. Even more, it's not possible to access the whole cgroup filesystem until i kill that rmdir (anything, which tries it, just hangs). All unremoveable cgroups has this in 'memory.oom_control': oom_kill_disable 0 under_oom 1 And, yes, 'tasks' file is empty. azur -- 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/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>