Michal Hocko <mhocko@xxxxxxx> writes: > It seems that this one fell though the cracks? Not completely, but it happened just as I was doing my initial triage of memcg problems and I haven't quite made it back to this. I have an even nastier memcg hang (without yet an easy reproducer). During mkdir ext3 can add a page to the page cache with the ext3 journal transaction lock held. Normally that isn't a problem but freezing there stops all writes to that filesystem, and the world stops. It looks like the only way to avoid that kind of scenario is to move the the memcg sleep to the edge of userspace, like we do with signals and a few other things so we can be guaranteed not to increase lock hold times, when it is avoidable. I think I saw some similar comments about the slab limiting. Eric _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/containers
