[pve-devel] cpuflag: pcid needed in guest for good performance after meltdown

[Michael Rasmussen]

On Tue, 9 Jan 2018 19:21:15 +0100
Fabian Grünbichler <f.gruenbichler at proxmox.com> wrote:

> 
> yes. it's an Intel CPU feature, and only needed to reduce the
> performance impact of KPTI, which is a mitigation for a bug affecting
> Intel CPUs (and some ARM). since KPTI is disabled unless manually forced
> on AMD CPUs, the fact that there is no PCID does not matter there ;)
> 
As shown in my last post (except for the mail server censuring images)
was, that I have pki=on and this seems to have little or no effect on
Opeteron processors what so ever. This could imply that this is an
Intel problem only (NSA conspiracy hat on)

-- 
Hilsen/Regards
Michael Rasmussen

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