The following series (written by Ben Blum) adds a "cgroup.procs" file
to each cgroup that reports unique tgids rather than pids, and fixes a
pid namespace bug in the existing "tasks" file that could cause
readers in different namespaces to interfere with one another.
The patches as a pair provide similar functionality to Li Zefan's
patch posted yesterday, with the addition on the "cgroup.procs" file;
if it's decided that Li's patch needs to be fast-tracked to 2.6.31,
then these patches can be rebased as a small extension of Li's patch;
if Li'z patch doesn't need to go to 2.6.31 then it makes more sense to
take this pair since they provide more overall functionality.
---
Ben Blum (2):
Adds a read-only "procs" file similar to "tasks" that shows only unique tgids
Ensures correct concurrent opening/reading of pidlists across pid namespaces
include/linux/cgroup.h | 46 +++++-
kernel/cgroup.c | 355 +++++++++++++++++++++++++++++++++---------------
2 files changed, 285 insertions(+), 116 deletions(-)
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