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Merge pull request #114464 from rnhmjoj/ksm

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nixos/ksm: rewrite using systemd-tmpfiles
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Florian Klink 2021-02-26 22:43:59 +01:00 committed by GitHub
commit d52d0a1d73
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3 changed files with 29 additions and 6 deletions
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12
nixos/modules/hardware/ksm.nix
View File

@ -26,13 +26,13 @@ in {
systemd.services.enable-ksm = {
description = "Enable Kernel Same-Page Merging";
wantedBy = [ "multi-user.target" ];
after = [ "systemd-udev-settle.service" ];
script = ''
if [ -e /sys/kernel/mm/ksm ]; then
script =
''
echo 1 > /sys/kernel/mm/ksm/run
${optionalString (cfg.sleep != null) ''echo ${toString cfg.sleep} > /sys/kernel/mm/ksm/sleep_millisecs''}
fi
'';
'' + optionalString (cfg.sleep != null)
''
echo ${toString cfg.sleep} > /sys/kernel/mm/ksm/sleep_millisecs
'';
};
};
}

1
nixos/tests/all-tests.nix
View File

@ -196,6 +196,7 @@ in
keymap = handleTest ./keymap.nix {};
knot = handleTest ./knot.nix {};
krb5 = discoverTests (import ./krb5 {});
ksm = handleTest ./ksm.nix {};
kubernetes.dns = handleTestOn ["x86_64-linux"] ./kubernetes/dns.nix {};
# kubernetes.e2e should eventually replace kubernetes.rbac when it works
#kubernetes.e2e = handleTestOn ["x86_64-linux"] ./kubernetes/e2e.nix {};

22
nixos/tests/ksm.nix Normal file
View File

@ -0,0 +1,22 @@
import ./make-test-python.nix ({ lib, ...} :
{
name = "ksm";
meta = with lib.maintainers; {
maintainers = [ rnhmjoj ];
};
machine = { ... }: {
imports = [ ../modules/profiles/minimal.nix ];
hardware.ksm.enable = true;
hardware.ksm.sleep = 300;
};
testScript =
''
machine.start()
machine.wait_until_succeeds("test $(</sys/kernel/mm/ksm/run) -eq 1")
machine.wait_until_succeeds("test $(</sys/kernel/mm/ksm/sleep_millisecs) -eq 300")
'';
})