On 6/27/19 10:20 AM, Tejun Heo wrote: > 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. > Thanks for the information. Will take a serious look at that. Cheers, Longman
