tree ff971f83721d006df7150c8a53f440d246d33c36
parent c003b515e9668ee91d14eea124b66f6bcef89377
author Martijn Coenen <maco@google.com> 1453336756 -0800
committer Martijn Coenen <maco@google.com> 1454357064 +0100

Reuse mem cgroups for tracking forked PIDs.

It turns out we were using the CPU accounting
cgroups for keeping track of processes that were
forked by an app without the framework's knowledge,
so we could kill all of them reliably (see b/15313911
for context).

Since we want to use memory cgroups for other purposes,
we might as well use memory cgroups for tracking forked
PIDs if they're enabled. This also gets us automatic cleanup
of empty mem cgroups.

Also, removed old mem cgroup mount point that is no
longer used, as well as cgroup release agent code that
we're not using.

Change-Id: I69d5cc31c162ffa49ef6945755f41381e306cc8b