On Sat, May 28, 2022 at 10:35 PM Borislav Petkov <bp@xxxxxxxxx> wrote: > > On Fri, May 27, 2022 at 12:25:53PM +0200, Ingo Molnar wrote: > > Turns out Boris just sent a competing optimization to clear_user() 3 days ago: > > > > https://lore.kernel.org/r/YozQZMyQ0NDdD8cH@xxxxxxx > > Yes, and that one needs to be properly measured and verified it doesn't > impact any workload. I have been working on this for a while now so > let's all relax ourselves - it'll get fixed properly eventually. > > What you could do in the meantime is, run it and see if your > microbenchmarks are happy with it. > > Because clear_user() doesn't matter one whit in real workloads, as we > realized upthread. > Can you CC me on further evolution of this patch? What was the (Git) base for it? Can you describe your or a test-case on how to test it? Unfortunately, I cannot get the patch from the above link with the b4 tool. link="https://lore.kernel.org/all/YozQZMyQ0NDdD8cH@xxxxxxx/"; b4 -d am $link Gives a strange collection of akpm mm patchset. Thanks. -Sedat- > Thx. > > -- > Regards/Gruss, > Boris. > > https://people.kernel.org/tglx/notes-about-netiquette
