Re: [PATCH v9 04/10] x86: refcount: prevent gcc distortions

Borislav Petkov
2018-10-05T11:20:18Z

On Fri, Oct 05, 2018 at 11:31:08AM +0200, Ingo Molnar wrote:
>
> * Nadav Amit <namit@vmware.com> wrote:
>
> > > Are you using defconfig or a reasonable distro-config for your tests?
> >
> > I think it is best to take the kernel and run localyesconfig for testing.
>
> Ok, agreed - and this makes the numbers you provided pretty representative.
>
> Good - now that all of my concerns were addressed I'd like to merge the remaining 3 patches as
> well - but they are conflicting with ongoing x86 work in tip:x86/core. The extable conflict is
> trivial, the jump-label conflict a bit more involved.

FWIW, gcc guys are not too averse to the idea of enhancing gcc inline
asm syntax with a statement which specifies its size so that gcc can use
it to do better inlining cost estimation than counting lines.

Lemme work the process ...

--
Regards/Gruss,
Boris.

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