Non-alphanumeric names
hakavlad opened this issue · comments
Example of output for some non-alphanumeric names:
янв 23 05:24:15 PC earlyoom[18493]: Low memory! At or below SIGKILL limits (mem: 1 %, swap: 1 %)
янв 23 05:24:15 PC earlyoom[18493]: mem avail: 200 of 13855 MiB ( 1 %), swap free: 0 of 0 MiB ( 0 %)
янв 23 05:24:15 PC earlyoom[18493]: [90B blob data]
янв 23 05:28:15 PC earlyoom[18493]: mem avail: 9861 of 13855 MiB (71 %), swap free: 0 of 0 MiB ( 0 %)
This strange behavior should be documented and explained.
What is [90B blob data]?
And how --prefer and --avoid works with non-alphanumeric names?
Examples of cmdlines that was handled incorrectly: ./ЙЦУКЕНГШЩ, ./ячсмитьб, ./1ああああああああ1.
With debug:
янв 23 06:02:47 PC earlyoom[19296]: pid 19296: badness 0 vm_rss 1860 earlyoom
янв 23 06:02:47 PC earlyoom[19296]: pid 19297: badness 0 vm_rss 3780 sudo
янв 23 06:02:47 PC earlyoom[19296]: pid 19298: badness 0 vm_rss 5340 journalctl
янв 23 06:02:47 PC earlyoom[19296]: [53B blob data]
янв 23 06:02:47 PC earlyoom[19296]: ^ new victim (higher badness)
янв 23 06:02:47 PC earlyoom[19296]: [90B blob data]
янв 23 06:02:47 PC earlyoom[19296]: selecting victim and sending signal took 8.008 ms
янв 23 06:02:47 PC earlyoom[19296]: adaptive sleep time: 100 ms
янв 23 06:02:47 PC earlyoom[19296]: adaptive sleep time: 461 ms
Killing process '...' with signal 9, pid: 19368, badness: 702, VmRSS: 9714 MiB is not displayed.
How do you view the log file? Can you try journalctl -a ?
How do you view the log file?
sudo journalctl -eu earlyoom
or realtime view:
sudo journalctl -fu earlyoom
Output in terminal:
mem avail: 8297 of 13855 MiB (59 %), swap free: 0 of 0 MiB ( 0 %)
mem avail: 5708 of 13855 MiB (41 %), swap free: 0 of 0 MiB ( 0 %)
mem avail: 2796 of 13855 MiB (20 %), swap free: 0 of 0 MiB ( 0 %)
Low Memory! At or below SIGTERM limits (mem: 10 %, swap: 10 %)
mem avail: 1410 of 13855 MiB (10 %), swap free: 0 of 0 MiB ( 0 %)
Killing process 'ячсмить�' with signal 15, pid: 19504, badness: 605, VmRSS: 8367 MiB
mem avail: 9768 of 13855 MiB (70 %), swap free: 0 of 0 MiB ( 0 %)
mem avail: 9759 of 13855 MiB (70 %), swap free: 0 of 0 MiB ( 0 %)
journalctl -a:
янв 23 06:12:30 PC earlyoom[19296]: pid 19298: badness 0 vm_rss 5964 journalctl
янв 23 06:12:30 PC earlyoom[19296]: pid 19443: badness 704 vm_rss 9971980 ячсмить<D0>
янв 23 06:12:30 PC earlyoom[19296]: ^ new victim (higher badness)
янв 23 06:12:30 PC earlyoom[19296]: Killing process 'ячсмить<D0>' with signal 9, pid: 19443, badness: 704, VmRSS: 9738 MiB
янв 23 06:12:30 PC earlyoom[19296]: selecting victim and sending signal took 7.948 ms
янв 23 06:12:30 PC earlyoom[19296]: adaptive sleep time: 100 ms
янв 23 06:12:30 PC earlyoom[19296]: adaptive sleep time: 438 ms
янв 23 06:12:31 PC earlyoom[19296]: adaptive sleep time: 1000 ms
In nohang I get
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd0 in position 20: invalid continuation byte
at
with open('/proc/' + pid + '/status') as f:
for line in f:
By the way, cmdline was handled correctly.
Short unicode names (like йцук) was handled correctly. This problem appears if len(name) > 15 bytes.
Journalctl output with blob data if a process with the Unicode name is in the process list (without earlyoom):
янв 23 16:46:58 PC kernel: [19734] 1000 19734 194620 2022 229 4 0 0 kate
янв 23 16:46:58 PC kernel: [20437] 0 20437 79344 424 57 3 0 0 packagekitd
янв 23 16:46:58 PC kernel: [21057] 1000 21057 231392 7771 259 4 0 0 dolphin
янв 23 16:46:58 PC kernel: [92B blob data]
янв 23 16:46:58 PC kernel: [24555] 1000 24555 787871 186037 857 6 0 0 firefox-esr
янв 23 16:46:58 PC kernel: [24697] 1000 24697 782208 190934 861 6 0 0 firefox-esr
янв 23 16:46:58 PC kernel: [25998] 1000 25998 651199 41884 388 6 0 0 Web Content
янв 23 16:46:58 PC kernel: [26856] 1000 26856 194620 2006 223 3 0 0 kate
янв 23 16:46:58 PC kernel: [27225] 1000 27225 49826 543 81 3 0 0 file.so
янв 23 16:46:58 PC kernel: [27233] 1000 27233 589991 24892 409 5 0 0 vlc
янв 23 16:46:58 PC kernel: [27443] 1000 27443 504571 32843 368 5 0 0 Web Content
янв 23 16:46:58 PC kernel: [27672] 1000 27672 2718374 2713392 5314 15 0 0 python3
янв 23 16:46:58 PC kernel: Out of memory: Kill process 27672 (python3) score 766 or sacrifice child
янв 23 16:46:58 PC kernel: Killed process 27672 (python3) total-vm:10873496kB, anon-rss:10853568kB, file-rss:0kB, shmem-rss:0kB
янв 23 16:47:32 PC sudo[27685]: user : TTY=pts/0 ; PWD=/home/user ; USER=root ; COMMAND=/bin/journalctl -e
янв 23 16:47:32 PC sudo[27685]: pam_unix(sudo:session): session opened for user root by (uid=0)
May be it is a journalctl bug and it is not a bug for earlyoom. But output may be fixed if you remove bad bytes from names like this:
with open('/proc/' + pid + '/stat', 'rb') as f:
line = f.read().decode('utf-8', 'ignore')
I don't know how to do it in C, but I have already solved this problem in nohang.