I managed temporary to change limits from command line, but I/O priority can't be increased x@debian:~$ su - Password: root@debian:~# ulimit -e unlimited root@debian:~# ulimit -r unlimited root@debian:~# su - x x@debian:~$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) unlimited file size (blocks, -f) unlimited pending signals (-i) 8055 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) unlimited stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 8055 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited x@debian:~$ cat /proc/self/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max resident set unlimited unlimited bytes Max processes 8055 8055 processes Max open files 1024 4096 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 8055 8055 signals Max msgqueue size 819200 819200 bytes Max nice priority unlimited unlimited Max realtime priority unlimited unlimited Max realtime timeout unlimited unlimited us x@debian:~$ mplayer_nice cant set I/O priority MPlayer svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team
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