AMD burns Intel with the best Linux Kernel patch ever ensuring that AMD CPU performance is not affected by PTI

[Sauron]

I hope my intel machines aren't hit too hard in performance, at least for the tasks I need them to perform. Definitely not buying an Intel CPU this year.

[Misanthrope]

You seem to be very exited about Linux developments lately. I mean don't get me wrong I don't want to take away from your passion but most of us don't look at code and think "OMG SICK FUCKING BUUUUURN!" because of the name of a few variables.

[Norseman4]

13 hours ago, AluminiumTech said:

[ ... ] AMD's method of fixing this was quite humorous and burns Intel a lot. [ ... ]

 

/* Assume for now that ALL x86 CPUs are insecure */
-	setup_force_cpu_bug(X86_BUG_CPU_INSECURE);
+	if (c->x86_vendor != X86_VENDOR_AMD)
+		setup_force_cpu_bug(X86_BUG_CPU_INSECURE);

https://lkml.org/lkml/2017/12/27/2

Actually, there is no burn there, just checking to see if the CPU vendor is AMD and bypassing the PTI fix if it is. This, using, presumably, pre-defined constants.

 

They should have also modified the comment block to specify that AMD has been verified to not be affected by the Meltdown issue.

 

I'm assuming that the bypassed code only corrects PTI and not either levels of Spectre.

[Bananasplit_00]

Well before we see benchmark numbers I'm not going to cry much over this tbh, but this is pretty funny anyway

[suits]

Dear AMD please put out a chip that can compete in power with the 8700k. Thank you amen... ugh

[AlTech]

3 minutes ago, suits said:

Dear AMD please put out a chip that can compete in power with the 8700k. Thank you amen... ugh

Ryzen 2800X Hopefully.