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[solved] does stdout of a process counts for CGroup memory?

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toralf
Developer

Joined: 01 Feb 2004
Posts: 3940
Location: Hamburg

Posted: Fri Nov 08, 2024 1:08 pm Post subject: [solved] does stdout of a process counts for CGroup memory?

exceeds memory.max.

I do use [1] to fuzz test OpenSSL. I do start a new fuzzer via [2]

Code:

nice -n 3 /usr/bin/afl-fuzz -i $input_dir -o ./ $add -I $0 -- ./$(basename $exe) &>./fuzz.log &
local pid=$!

and then limit the memory of the process [3]

Code:

echo "$pid" >$name/cgroup.procs
echo "2G" >$name/memory.max

I do wonder why the process is reaped (oom-killer) by my system if the size of fuzz.log is near to the limit (2GB as in the example)?
Why does the log file size counts too and not only the used memory by the process?

[1] https://github.com/toralf/fuzz-utils/tree/main
[2] https://github.com/toralf/fuzz-utils/blob/main/fuzz.sh#L247
[3] https://github.com/toralf/fuzz-utils/blob/main/fuzz-cgroup.sh#L27

Update: continued at https://www.spinics.net/lists/cgroups/msg45286.html

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