[pve-devel] [PATCH qemu-server] fix removing cpulimit on running vm

Dominik Csapak d.csapak at proxmox.com
Thu Oct 21 12:51:43 CEST 2021


On 10/21/21 11:53, Oguz Bektas wrote:
> hi,
> 
> works for cgroupv2 but with 'systemd.unified_cgroup_hierarchy=0' in
> cmdline it errors:
> 
> 
> ====
> update VM 101: -delete cpulimit
> 400 Parameter verification failed.
> cpulimit: hotplug problem - closing file
> '/sys/fs/cgroup/cpu/qemu.slice/101.scope//cpu.cfs_period_us' failed -
> Invalid argument
> ====
> 
> 

hm... does this work for running containers? since we use the
exact same code there for cpulimit...

> On Tue, Oct 12, 2021 at 01:20:52PM +0200, Dominik Csapak wrote:
>> like in pve-container:
>> 04a62bd ("fix #3506: config: fix removing the cpulimit of a running CT")
>>
>> reported in the forums (no bug# yet):
>> https://forum.proxmox.com/threads/issue-with-removing-cpu-limit-from-running-vm.97799/
>>
>> Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
>> ---
>>   PVE/QemuServer.pm | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
>> index eb29fc2..1d31d02 100644
>> --- a/PVE/QemuServer.pm
>> +++ b/PVE/QemuServer.pm
>> @@ -4754,7 +4754,7 @@ sub vmconfig_hotplug_pending {
>>   	    } elsif ($opt eq 'cpuunits') {
>>   		$cgroup->change_cpu_shares(undef, 1024);
>>   	    } elsif ($opt eq 'cpulimit') {
>> -		$cgroup->change_cpu_quota(-1, 100000);
>> +		$cgroup->change_cpu_quota(undef, undef); # reset, cgroup module can better decide values
>>   	    } else {
>>   		die "skip\n";
>>   	    }
>> -- 
>> 2.30.2
>>
>>
>>
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>>
>>
> 
> 
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