Hello again, Linus. On Sun, Nov 27, 2011 at 01:25:58PM -0800, Tejun Heo wrote: > The problem is that cred_guard_mutex uses _interruptible/_killable > operations and rwsem doesn't have them, so cred_guard_mutex can't be > easily replaced with write-locking group_rwsem. > > If the two locks can't be merged, under the proposed scheme, while not > exactly pretty, both fork/exit and exec paths go through single > locking and only the ones which want stable threadgroup need to grab > both locks, so IMHO it is at least reasonable. > > Any better ideas? I agree that the proposed solution is rather ugly but stable thread-group is a valid mechanism to have and cgroup can benefit a lot from it. I'd be happy to revamp the implementation if anyone can come up with a better way and can add big fat comment stating that. Until something better comes up, would it be okay to stick with this implementation? Thanks. -- tejun _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
