(In reply to Michal Hocko from comment #9) > > I do not think so because, again that is not a generally advisable thing to > do. I can imagine somebody not wanting to increase shmem size when a new > memory is added or allow smaller or large portion of new memory to be > considered. Kernel doesn't know about that. In this case, the issue is not about policy but the way it's implemented: remounting all the tmpfs fs from userspace seems pretty ugly.