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RE: [4.17?] Re: [PATCH v3 0/5] x86/mwait-idle: (remaining) SPR + (new) ADL support
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Henry Wang <Henry.Wang@xxxxxxx>
- Date: Thu, 13 Oct 2022 12:46:50 +0000
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 13 Oct 2022 12:47:13 +0000
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- Thread-topic: [4.17?] Re: [PATCH v3 0/5] x86/mwait-idle: (remaining) SPR + (new) ADL support
Hi Jan,
> -----Original Message-----
> From: Jan Beulich <jbeulich@xxxxxxxx>
> Subject: [4.17?] Re: [PATCH v3 0/5] x86/mwait-idle: (remaining) SPR + (new)
> ADL support
>
> Henry,
>
> On 18.08.2022 15:02, Jan Beulich wrote:
> > New changes have appeared in the meantime, in particular one partly
> undoing
> > what we still haven't merged (patch 1 here).
> >
> > 1: add 'preferred_cstates' module argument
> > 2: add core C6 optimization for SPR
> > 3: add AlderLake support
> > 4: disable IBRS during long idle
> > 5: make SPR C1 and C1E be independent
>
> just now acks have completed coming in for this series of ports of earlier
> Linux commits. This all targets newer hardware which of course we'd like
> to properly support with 4.17. Unfortunately the series was kind of lost
> with all the security work which had been ongoing. Therefore I'd like to
> ask (in part also motivated by Andrew to do so) that you consider still
> allowing in this series. In the (I think) not very likely case of problems
> (first and foremost because of the changes coming from Linux, rather than
> being homegrown) people always have the option of simply turning off the
> use of this driver on their systems.
I just checked the x86 gitlab board for the list and saw this series is on it.
So
yes, please add my release ack. For now we still have 2 weeks before the release
and I think that would be a reasonable time for bugs to emerge.
To set expectations I am personally be more conservative in between the RC3
to RC4 week, because the fear of last minute bugs.
Kind regards,
Henry
>
> Thanks, Jan
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