But it was backported on 6.6 and the performance impact is pretty high
on some workloads.
As this patch is only providing a perf benefit and to keep consistency
with other stable kernels, would it be possible to get it merged ?

Le jeu. 28 nov. 2024 à 16:52, Sasha Levin <sashal@kernel.org> a écrit :
>
> On Thu, Nov 28, 2024 at 12:59:24PM +0100, Borislav Petkov wrote:
> >Hey folks,
> >
> >On Mon, Jan 15, 2024 at 06:26:56PM -0500, Sasha Levin wrote:
> >> From: "Borislav Petkov (AMD)" <bp@alien8.de>
> >>
> >> [ Upstream commit 04c3024560d3a14acd18d0a51a1d0a89d29b7eb5 ]
> >>
> >> AMD does not have the requirement for a synchronization barrier when
> >> acccessing a certain group of MSRs. Do not incur that unnecessary
> >> penalty there.
> >
> >Erwan just mentioned that this one is not in 6.1 and in 5.15. And I have mails
> >about it getting picked up by AUTOSEL.
> >
> >Did the AI reconsider in the meantime?
>
> You've missed the 5.10 mail :)
>
> Pavel objected to it so I've dropped it: https://lore.kernel.org/all/Zbli7QIGVFT8EtO4@sashalap/
>
> --
> Thanks,
> Sasha