black_zion

Linus Torvalds goes off on Intel about Spectre patches

Discussion created by black_zion on Jan 28, 2018
Latest reply on Jan 30, 2018 by pokester

I can't copy and quote the whole thing because there is some of his trademark Gordon Ramsay-esque language (for good reason), but here's a great excerpt. Wonder if Lisa Su and the AMD execs are laughing their ßutt off after reading it since they're staying clear of this?

 

https://lkml.org/lkml/2018/1/21/192

 

Have you _looked_ at the patches you are talking about? You should

have - several of them bear your name.

 

The patches do things like add the garbage MSR writes to the kernel

entry/exit points. That's insane. That says "we're trying to protect

the kernel". We already have retpoline there, with less overhead.

 

So somebody isn't telling the truth here. Somebody is pushing complete

garbage for unclear reasons. Sorry for having to point that out.

 

If this was about flushing the BTB at actual context switches between

different users, I'd believe you. But that's not at all what the

patches do.

 

As it is, the patches are COMPLETE AND UTTER GARBAGE.

 

They do literally insane things. They do things that do not make

sense. That makes all your arguments questionable and suspicious.

 

The patches do things that are not sane.

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