Re: [PATCH 0/2] x86: Remove ideal_nops[]

[Sedat Dilek]

On Sat, Mar 13, 2021 at 1:15 PM Borislav Petkov <bp@xxxxxxxxx> wrote:
>
> On Sat, Mar 13, 2021 at 01:10:29PM +0100, Sedat Dilek wrote:
> > Here we go:
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/patch/?id=864b435514b286c0be2a38a02f487aa28d990ef8
>
> That's why I told earlier you to use tip/master - that patch is already
> in it and all you would've needed to do is to apply the two nop patches.
>

Thanks for all your testings and suggestions.

For me it was easier to apply these 3 patches on top of my custom
patchset to see what impact Peter's patchset.

AFAICS you did a 5 times x86-64 defconfig with dropped pagecache and `make -j9`?
I run my "normal" workflow(s) (and build-script) for easier comparison
on my side.

Big thank-you for testing with LLVM/Clang v11.x - twice as slow as with GCC :-(.
A selfmade ThinLTO+PGO optimized LLVM tooolchain v11.x/v12-rcX/v13-git
is here as fast as Debian's GCC-v10.2.1 to build a Linux-kernel -
approx. 03:30 [hh:mm] - full adapted Debian v5.10.y kernel-config.
Does your distribution offer LLVM/Clang v12.0.0-rc3 (released this
week) binaries?

- Sedat -