Re: [PATCH] cgroup/cpuset: Move procfs cpuset attribute under cgroup-v1.c

[Waiman Long <llong@redhat.com>]

On 1/16/25 12:25 PM, Tejun Heo wrote:
> Hello,
>
> On Thu, Jan 16, 2025 at 03:05:32PM +0100, Michal Koutný wrote:
>> On Thu, Jan 16, 2025 at 08:40:56AM -0500, Waiman Long <llong@redhat.com> wrote:
>>> I do have some reservation in taking out /proc/<pid>/cpuset by default as
>>> CPUSETS_V1 is off by default. This may break some existing user scripts.
>> Cannot be /proc/$pid/cpuset declared a v1 feature?
>> Similar to cpuset fs (that is under CPUSETS_V1). If there's a breakage,
>> the user is not non-v1 ready and CPUSETS_V1 must be enabled.
> I think we can try given that the config is providing an exit path. After
> all, users who were depending on cpusets on v1 are in the same boat.
I am not totally against this, but I think we need to make the 
relationship between the CPUSETS_V1 config and /proc/<pid>/cpuset file 
more visible if we want to go this route. We should update the help text 
of CPUSETS_V1 config entry to emphasize this.

Cheers,
Longman