Hello. On Tue, Oct 25, 2022 at 11:33:56AM +0200, Pavel Hrdina <phrdina@xxxxxxxxxx> wrote: > Unfortunately this breaks a lot of things and we cannot use it even as > workaround. Libvirt code has few assumptions as that's how unified mode > works and when the cgroups v2 backend is enabled for hybrid topology we > assume that cpuacct, devices controllers are enabled. To be on the same side -- there's no cpuacct and devices on cgroup v2 (regardless of hybrid or unified mode). > But in the case of hybrid topology they are enabled by cgroups v1. Due > to this change we no longer limit access to devices and cpu accounting > no longer works. Shouldn't v1 backend still carry that out? (On a higher level -- I understand that having both backends enabled for the hybrid mode is what's not working well.) > I'm going to send a patch to revert this one and we need to find yet > another solution to the issue. BTW do you have any pointers (a commit) when the hybrid mode could have become broken for libvirt/lxc? (I estimate from the (lack of) user reports that it must have worked at the time of libvirt 4.0.) Thanks, Michal
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