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.
