linux-kernel - Re: [PATCH AUTOSEL 5.15 11/12] x86/barrier: Do not serialize MSR accesses on AMD

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Message-ID: <20241129133310.GDZ0nClg7mDbFaqxft@fat_crate.local>
Date: Fri, 29 Nov 2024 14:33:10 +0100
From: Borislav Petkov <bp@...en8.de>
To: Erwan Velu <erwanaliasr1@...il.com>
Cc: Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com,
	dave.hansen@...ux.intel.com, x86@...nel.org, puwen@...on.cn,
	seanjc@...gle.com, kim.phillips@....com, jmattson@...gle.com,
	babu.moger@....com, peterz@...radead.org,
	rick.p.edgecombe@...el.com, brgerst@...il.com, ashok.raj@...el.com,
	mjguzik@...il.com, jpoimboe@...nel.org, nik.borisov@...e.com,
	aik@....com, vegard.nossum@...cle.com,
	daniel.sneddon@...ux.intel.com, acdunlap@...gle.com, pavel@...x.de
Subject: Re: [PATCH AUTOSEL 5.15 11/12] x86/barrier: Do not serialize MSR
 accesses on AMD

On Fri, Nov 29, 2024 at 10:30:11AM +0100, Erwan Velu wrote:
> We all know how difficult it is to maintain kernels and support the hard
> work you do on this.  It's also up to us, the users & industry, to give
> feedback and testing around this type of story.  It could probably be
> interesting to have a presentation around this at KernelRecipes ;)

Yes, absolutely.

And you should reserve a whole slot of 1h after it for discussion. Because all
the folks using stable kernels or doing backports will definitely have
experience and thoughts to share... who knows, might improve the proces in the
end.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette