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

On Sat, Mar 13, 2021 at 1:15 PM Borislav Petkov [off-list ref] wrote:

On Sat, Mar 13, 2021 at 01:10:29PM +0100, Sedat Dilek wrote:

quoted

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 -