Re: [tip:x86/platform] x86/PCI/mmcfg: Switch to ECAM config mode if possible
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- Subject: Re: [tip:x86/platform] x86/PCI/mmcfg: Switch to ECAM config mode if possible
- From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
- Date: Fri, 30 Jun 2017 16:30:54 +0200 (CEST)
- Cc: Yinghai Lu <yinghai@xxxxxxxxxx>, Stephane Eranian <eranian@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Bjorn Helgaas <helgaas@xxxxxxxxxx>, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>, Matthew Wilcox <willy@xxxxxxxxxxxxxxx>, Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>, "linux-tip-commits@xxxxxxxxxxxxxxx" <linux-tip-commits@xxxxxxxxxxxxxxx>
- In-reply-to: <20170630031849.GP23705@tassilo.jf.intel.com>
- References: <20170316215057.452220163@linutronix.de> <tip-b5b0f00c760b6e9673ab79b88ede2f3c7a039f74@git.kernel.org> <CAE9FiQVAqZRtMLKTtySaCiCbDicN0h=6dPXEGP1M2eAq9AiYXQ@mail.gmail.com> <20170630031849.GP23705@tassilo.jf.intel.com>
- User-agent: Alpine 2.20 (DEB 67 2015-01-07)
On Thu, 29 Jun 2017, Andi Kleen wrote:
> > Would this patch actually void the commit:
>
> Yes it does. My origina; patches were opt-in for this reason, but Thomas doesn't
> believe in historical or other people's experience.
I did not realize that particular wreckage.
> But MCFG problems were a long time ago and noone uses these systems anymore,
> so perhaps he is right.
The obvious solution to this is to force type 1 for older machines, i.e. <=
K8. Some day we should stop supporting 15+ years old crap just because we
can.
Thanks,
tglx
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