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|setup= | |setup= | ||
* This test case should be performed on either bare-metal or virtual machines. | |||
* Check that you are running systemd 248~rc1 or higher with `systemctl --version`. | |||
* Ensure the systemd-oomd-defaults package is installed (included with Fedora 34). | |||
* Boot the system and log in as a regular user. | |||
|actions= | |actions= | ||
* Check that systemd-oomd is running: | |||
<pre> | <pre> | ||
systemctl status systemd-oomd | systemctl status systemd-oomd | ||
</pre> | </pre> | ||
* Check that the systemd-oomd-defaults policy was applied by running `oomctl` and verifying that "/" is listed as a path under "Swap Monitored CGroups" along with the current swap usage. | |||
* Now run the test: | |||
<pre> | <pre> | ||
systemd-run --user --unit systoomd_swap_test tail /dev/zero | systemd-run --user --unit systoomd_swap_test tail /dev/zero | ||
</pre> | |||
* After verifying the results below, reset the unit: | |||
<pre> | |||
systemctl --user reset-failed systoomd_swap_test.service | |||
</pre> | </pre> | ||
|results= | |results= | ||
* systemd-oomd will have killed the unit started above. You can verify by checking for log lines that say something about "Swap used <...> is more than 90%" and "systemd-oomd killed <...> process(es)" with `journalctl`. The output of `systemctl --user status systoomd_swap_test` should say the unit is failed and killed (with no mention of oom-kill). | |||
* Swap used should be below 90% (use `free -h`) | |||
}} | }} | ||
Revision as of 11:23, 11 March 2021
Description
This test case tests that systemd-oomd kills the largest swap consumer when swap used is greater 90% (or whatever limit was defined by systemd-oomd-defaults).
Setup
- This test case should be performed on either bare-metal or virtual machines.
- Check that you are running systemd 248~rc1 or higher with
systemctl --version. - Ensure the systemd-oomd-defaults package is installed (included with Fedora 34).
- Boot the system and log in as a regular user.
How to test
- Check that systemd-oomd is running:
systemctl status systemd-oomd
- Check that the systemd-oomd-defaults policy was applied by running
oomctland verifying that "/" is listed as a path under "Swap Monitored CGroups" along with the current swap usage. - Now run the test:
systemd-run --user --unit systoomd_swap_test tail /dev/zero
- After verifying the results below, reset the unit:
systemctl --user reset-failed systoomd_swap_test.service
Expected Results
- systemd-oomd will have killed the unit started above. You can verify by checking for log lines that say something about "Swap used <...> is more than 90%" and "systemd-oomd killed <...> process(es)" with
journalctl. The output ofsystemctl --user status systoomd_swap_testshould say the unit is failed and killed (with no mention of oom-kill). - Swap used should be below 90% (use
free -h)