On Tue, Mar 04, 2014 at 07:59:29PM -0800, David Rientjes wrote: > Now that a per-process flag is available, define it for processes that > handle userspace oom notifications. This is an optimization to avoid > mantaining a list of such processes attached to a memcg at any given time > and iterating it at charge time. > > This flag gets set whenever a process has registered for an oom > notification and is cleared whenever it unregisters. > > When memcg reclaim has failed to free any memory, it is necessary for > userspace oom handlers to be able to dip into reserves to pagefault text, > allocate kernel memory to read the "tasks" file, allocate heap, etc. > > System oom conditions are not addressed at this time, but the same per- > process flag can be used in the page allocator to determine if access > should be given to userspace oom handlers to per-zone memory reserves at > a later time once there is consensus. > > Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx> ntil consensus on the whole approach can be reached, Nacked-by: Tejun Heo <tj@xxxxxxxxxx> Thanks. -- tejun -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>