Hello, Waiman. On Wed, Jun 26, 2019 at 12:56:14PM -0400, Waiman Long wrote: > With memory cgroup v1, there is a kmem.slabinfo file that can be > used to view what slabs are allocated to the memory cgroup. There > is currently no such equivalent in memory cgroup v2. This file can > be useful for debugging purpose. > > This patch adds an equivalent kmem.slabinfo to v2 with the caveat that > this file will only show up as ".__DEBUG__.memory.kmem.slabinfo" when the > "cgroup_debug" parameter is specified in the kernel boot command line. > This is to avoid cluttering the cgroup v2 interface with files that > are seldom used by end users. Can you please take a look at drgn? https://github.com/osandov/drgn Baking in debug interface files always is limited and nasty and drgn can get you way more flexible debugging / monitoring tool w/o having to bake in anything into the kernel. For an example, please take a look at https://lore.kernel.org/bpf/20190614015620.1587672-10-tj@xxxxxxxxxx/ Thanks. -- tejun
