13.05.2020, 05:03, "David Ahern" [off-list ref]:

On 5/9/20 10:52 AM, Dmitry Yakunin wrote:

quoted

 This patch prepares infrastructure for matching sockets by cgroups.
 Two helper functions are added for transformation between cgroup v2 ID
 and pathname. Cgroup v2 cache is implemented as hash table indexed by ID.
 This cache is needed for faster lookups of socket cgroup.

 v2:
   - style fixes (David Ahern)

you missed my other comment about this set. Running this new command on
a kernel without support should give the user a better error message
than a string of Invalid arguments:

$ uname -r
5.3.0-51-generic

$ ss -a cgroup /sys/fs/cgroup/unified
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument
RTNETLINK answers: Invalid argument

No, i didn't miss your comment. This patchset was extended with the third patch which includes bytecode filter checking.