On Fri, 22 Sep 2023 10:08:36 +0200 Christian Brauner <brauner@xxxxxxxxxx> wrote: > On Fri, Sep 22, 2023 at 10:18:24AM +0800, Cai Xinchen wrote: > > Hello: > > I am doing some test for kernel 6.4, util-linux version:2.39.1. > > Have you encountered similar problems? If there is a fix, please > > let me know. > > Thank you very much > > > > -------------------------------------------------- > > > > util-linux version 2.39.1 call mount use fsopen->fsconfig->fsmount->close > > instead of mount syscall. > > > > And use this shell test: > > > > #!/bin/bash > > mkdir -p /tmp/cgroup/cgrouptest > > while true > > do > > mount -t cgroup -o none,name=foo cgroup /tmp/cgroup/cgrouptest > > > > in mount syscall, no function will check fs->phase, and fc is recreate > > in monnt syscall. However, in fdconfig syscall, fc->phase is not initial as > > FS_CONTEXT_CREATE_PARAMS, restart_syscall will return -EBUSY. fc is created > > in fsopen syscall. > > Mount api system calls aren't restartable so that doesn't work. cgroup2 > doesn't have this issue, only cgroup1 has. So cgroup1_get_tree() should > probably be fixed if anyone cares. > Dear colleagues, I've met the same issue a few years ago and tried to fix it: https://lore.kernel.org/all/20200923164637.13032-1-alexander.mikhalitsyn@xxxxxxxxxxxxx/ but didn't come into agreement about this. Kind regards, Alex
