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cgroup: get_pressure_stat: handle v1 controller gracefully

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and return the default zeroed $res in case we cannot get any path

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
This commit is contained in:
Thomas Lamprecht 2021-02-08 16:04:18 +01:00
parent eadfaabdae
commit b82ddf5d99
1 changed files with 6 additions and 5 deletions
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11
src/PVE/CGroup.pm
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@ -382,17 +382,18 @@ sub get_pressure_stat {
},
};
my ($path, $ver) = $self->get_path(undef, 1);
my ($path, $version) = $self->get_path(undef, 1);
if (!defined($path)) {
# container or VM most likely isn't running
return undef;
} elsif ($ver == 2) {
return $res; # container or VM most likely isn't running, retrun zero stats
} elsif ($version == 1) {
return undef; # v1 controller does not provides pressure stat
} elsif ($version == 2) {
for my $type (qw(cpu memory io)) {
my $stats = PVE::ProcFSTools::parse_pressure("$path/$type.pressure");
$res->{$type} = $stats if $stats;
}
} else {
die "bad cgroup version: $ver\n";
die "bad cgroup version: $version\n";
}
return $res;