Re: [PATCH bpf-next 1/2] bpftool: introduce cgroup tree command
From: Jakub Kicinski
Date: Fri Jul 06 2018 - 17:03:15 EST
On Fri, 6 Jul 2018 11:25:45 -0700, Roman Gushchin wrote:
> > Looks very useful! Minor nits/questions below. I think the reverse
> > mapping could also be interesting - similar to how -f flag shows where
> > program is pinned, we could add a flag which in
> > # bpftool prog show/list
> > adds info about cgroups where the program is attached? Obviously as a
> > future extension.
> Well, it would be convenient, but it's not always possible.
> A program can be attached to a dying cgroup (a cgroup which was deleted
> by a user, but still has some associated resources, e.g. pagecache).
Ack, the bpffs and cgroupfs searches are best effort by definition.
Thanks for addressing the other comments!