Hello, On Thu, Mar 16, 2017 at 05:31:59PM +0100, Oleg Nesterov wrote: > Or we can add another "unsigned no_cgroups:1" bit into task_struct, > not sure.
To synchronize around initialization, a PF flag would be easier as we can use wait_on_bit(). > Anyway, I do not understand the PF_NO_SETAFFINITY check in > __cgroup_procs_write(). task_can_attach() checks it too, so cgroups > can't change the affinity. Imo something explicit like no_cgroups > makes more sense. task_can_attach() predates the __cgroup_procs_write() and currently doesn't do anything. We can split the flag or rename it so that it's more generic. The reasons for disallowing cgroup migration have a lot of crosssection with affinity, so it's not a complete misnomer. Either way is fine by me. Thanks. -- tejun
