Documentation/admin-guide/cgroup-v2.rst: document why inactive_X + active_X may not...
authorChris Down <chris@chrisdown.name>
Sun, 1 Dec 2019 01:50:19 +0000 (17:50 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Sun, 1 Dec 2019 14:29:18 +0000 (06:29 -0800)
commit1603c8d1b1fbfbc20dcb363543b690de862849c0
tree3c2e76c8b974650e7924766abfb7e50d25eb53e0
parentfa40d1ee9f156624658ca409a04a78882ca5b3c5
Documentation/admin-guide/cgroup-v2.rst: document why inactive_X + active_X may not equal X

This has confused a significant number of people using cgroups inside
Facebook, and some of those outside as well judging by posts like
this[0] (although it's not a problem unique to cgroup v2).

If shmem handling in particular becomes more coherent at some point in
the future -- although that seems unlikely now -- we can change the
wording here.

[0]: https://unix.stackexchange.com/q/525092/10762

Link: http://lkml.kernel.org/r/20191111144958.GA11914@chrisdown.name
Signed-off-by: Chris Down <chris@chrisdown.name>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Documentation/admin-guide/cgroup-v2.rst