Quoting Linus Torvalds (torvalds@xxxxxxxxxxxxxxxxxxxx): > On Fri, May 13, 2011 at 9:16 AM, Linus Torvalds > <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > > > > Looks ok to me. And generates good code for acl_permission_check > > without CONFIG_USER_NS. > > > > I'll see how much that function drops on the kernel profiles.. > > Yup, looking good. > > For my "kernel make with no changes" workload, it dropped from > > 1.28% make [kernel.kallsyms] [k] acl_permission_check > > to > > 0.88% make [kernel.kallsyms] [k] > acl_permission_check > > which is pretty much exactly the expected 30% drop from no longer > having that expensive load of user_ns. > > Of course, that 30% improvement is just a 0.4% performance improvement > in the big picture, but hey, almost half a percentage point on a real > load from just one single function in the kernel is definitely worth > doing. That's great, thanks for the help. > Do you want to carry this for 2.6.40, or should I just apply it? It makes no user-visible difference so I'd say just apply it. thanks, -serge _______________________________________________ Containers mailing list Containers@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/containers
