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SubjectRe: [PATCH v2 2/2] cgroup: export list of cgroups v2 features using sysfs
On Mon, Nov 06, 2017 at 01:30:29PM -0500, Roman Gushchin wrote:
> The active development of cgroups v2 sometimes leads to a creation
> of interfaces, which are not turned on by default (to provide
> backward compatibility). It's handy to know from userspace, which
> cgroup v2 features are supported without calculating it based
> on the kernel version. So, let's export the list of such features
> using /sys/kernel/cgroup/features pseudo-file.
> The list is hardcoded and has to be extended when new functionality
> is added. Each feature is printed on a new line.
> Example:
> $ cat /sys/kernel/cgroup/features
> nsdelegate
> Signed-off-by: Roman Gushchin <>
> Cc: Tejun Heo <>
> Cc:

Applied 1-2 to cgroup/for-4.15.



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