[PATCH v5 3/3] cgroups: make procs file writable

[David Rientjes]

On Fri, 24 Dec 2010, Ben Blum wrote:

> I'll add a patch to my current series to do this. Should I leave alone
> the other cases where an out-of-memory causes a silent failure?
> (cpuset_change_nodemask, scan_for_empty_cpusets)
> 

Both are protected by cgroup_lock, so I think it should be a pretty simple 
change.  cpuset_change_nodemask() is interesting because a task within an 
oom cpuset may be changing its own nodemask for more memory and that could 
easily allow the NODEMASK_ALLOC() to fail for large CONFIG_NODES_SHIFT.  
scan_for_empty_cpusets() is interesting to avoid leaving the hierarchy in 
an inconsistent state.  So I think both of these would benefit from having 
a statically allocated nodemask protected by cgroup_lock().