Messages in this thread | | | Date | Thu, 27 Jun 2019 07:20:24 -0700 | From | Tejun Heo <> | Subject | Re: [PATCH] memcg: Add kmem.slabinfo to v2 for debugging purpose |
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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@kernel.org/
Thanks.
-- tejun
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