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

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Message-ID: <20241128164310.GCZ0idnhjpAV6wFWm6@fat_crate.local>
Date: Thu, 28 Nov 2024 17:43:10 +0100
From: Borislav Petkov <bp@...en8.de>
To: Sasha Levin <sashal@...nel.org>
Cc: 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,
	Erwan Velu <erwanaliasr1@...il.com>, pavel@...x.de
Subject: Re: [PATCH AUTOSEL 5.15 11/12] x86/barrier: Do not serialize MSR
 accesses on AMD

On Thu, Nov 28, 2024 at 10:52:44AM -0500, Sasha Levin wrote:
> You've missed the 5.10 mail :)

You mean in the flood? ;-P

> Pavel objected to it so I've dropped it: https://lore.kernel.org/all/Zbli7QIGVFT8EtO4@sashalap/

So we're not backporting those anymore? But everything else? :-P

And 5.15 has it already...

Frankly, with the amount of stuff going into stable, I see no problem with
backporting such patches. Especially if the people using stable kernels will
end up backporting it themselves and thus multiply work. I.e., Erwan's case.

Thx.

-- 
Regards/Gruss,
    Boris.

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