Not sure if this list is the right place, but I don't know anywhere
else to ask. I can't figure out how to limit memory usage by existing process.
I have a cgroup memory:limited (with 100M limit in
/sys/fs/cgroup/limited/memory.max_usage_in_bytes). If I run "cgexec
memory:limited program_name", then everything works as expected, most of the
program is forced to swap (zram in my case). This is useful for some bloated
programs where performance is not very important.
But if program_name is already running (without cgexec) and I try to
limit its memory usage:
cgclassify -g memory:swap $(pgrep -f program_name)
...then the program is added to /sys/fs/cgroup/limited/tasks, but
nothing else is happening (according to smem -k) - the program still uses as
much memory as before, even if it is using much more than
memory.max_usage_in_bytes allows.
Am I doing something wrong, or is this a bug or limitation of current
implementation? My Linux kernel version is 3.15.0 and I'm using cgroup-tools
from Debian Sid.
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