Messages in this thread | | | Date | Fri, 8 May 2020 12:12:09 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC][PATCH 3/3] x86/entry, ORC: Teach objtool/unwind_orc about stack irq swizzles |
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On Thu, May 07, 2020 at 11:24:49PM +0200, Thomas Gleixner wrote: > But over our IRC conversation I came up with a 3rd variant: > > For most of the vectors the indirect call overhead is just noise, so > we can run them through the ASM switcher, but for the resched IPI > we can just use a separate direct call stub in ASM.
Are we sure the rat-poison crap is noise for all the other system vectors? I suppose it is for most since they'll do indirect calls themselves anyway, right?
> I can live with that. I might have to pay up for Peter's headaches to > teach objtool, but that's a different story. Let me check how many beers > he owes me first ...
We're going to be so massively drunk if we ever settle that :-) For now I'll just have to live with knowing more about the unwinders.
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