Re: [Xen-devel] [PATCH v5 20/19] docs: add "sched-gran" boot parameter documentation

[Jan Beulich <jbeulich@xxxxxxxx>]

On 30.09.2019 13:26, Jürgen Groß wrote:
> And it will be fatal for large scale installations with AMD- and INTEL-
> servers. Boot-parameters having the same semantics should be named the
> same (regardless of the name or value part) in order to enable such
> customers to use the same setting on each server.

But such a large scale user would quite likely want the meaning of
"core" in the respective vendor's sense, i.e. CPU scheduling on AMD
(as not being affected by the various HT leaks), and core scheduling
on Intel. Due to AMD Fam17 now actually calling the thing HT too, in
fact such installations would likely want _different_ options when
the primary goal is security, and a secondary one is performance /
throughput. Otoh I guess this is going to be our default eventually,
i.e. no command line option ought to be needed to achieve this.

Jan

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