On Thu, Jun 30, 2022 at 04:25:57AM +0900, Tejun Heo wrote: > On Wed, Jun 29, 2022 at 09:13:02AM +0300, Vasily Averin wrote: > > I experimented on fedora36 node with LXC and centos stream 9 container. > > and I did not noticed any critical systemd troubles with original -EAGAIN. > > When cgroup's limit is reached systemd cannot start new services, > > for example lxc-attach generates following output: > > > > [root@fc34-vvs ~]# lxc-attach c9s > > lxc-attach: c9s: cgroups/cgfsng.c: cgroup_attach_leaf: 2084 Resource temporarily unavailable - Failed to create leaf cgroup ".lxc" > > lxc-attach: c9s: cgroups/cgfsng.c: __cgroup_attach_many: 3517 Resource temporarily unavailable - Failed to attach to cgroup fd 11 > > lxc-attach: c9s: attach.c: lxc_attach: 1679 Resource temporarily unavailable - Failed to attach cgroup > > lxc-attach: c9s: attach.c: do_attach: 1237 No data available - Failed to receive lsm label fd > > lxc-attach: c9s: attach.c: do_attach: 1375 Failed to attach to container > > > > I did not found any loop in userspace caused by EAGAIN. > > Messages looks unclear, however situation with the patched kernel is not much better: > > > > [root@fc34-vvs ~]# lxc-attach c9s > > lxc-attach: c9s: cgroups/cgfsng.c: cgroup_attach_leaf: 2084 No space left on device - Failed to create leaf cgroup ".lxc" > > lxc-attach: c9s: cgroups/cgfsng.c: __cgroup_attach_many: 3517 No space left on device - Failed to attach to cgroup fd 11 > > lxc-attach: c9s: attach.c: lxc_attach: 1679 No space left on device - Failed to attach cgroup > > lxc-attach: c9s: attach.c: do_attach: 1237 No data available - Failed to receive lsm label fd > > lxc-attach: c9s: attach.c: do_attach: 1375 Failed to attach to container > > I'd say "resource temporarily unavailable" is better fitting than "no > space left on device" +1 Thanks!
