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SubjectRe: patch "x86: MOVE PCI IO ECS code to x86/pci" breaks CPU hotplug

* Jan Beulich <> wrote:

> Converting __cpuinit functions called out of init_amd() (and similar
> others) to __init (and making them subject of xxx_initcall() handling
> isn't valid, as they would no longer be called for hot plugged CPUs.
> Further, since it's likely that in virtualized environments the MSR
> write would at best be ignored, I'd also recommend using the
> fault-safe accessors here *and* check that the bit actually got set
> before setting PCI_HAS_IO_ECS (one would obviously have to BUG() when
> hot-plugged CPUs fail to set the bit when those available at boot
> successfully did so).

hm, which patch is this exactly, and in what tree? It's not upstream nor
in -tip.


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