* Keith Busch <[email protected]> wrote:
> On Sat, 3 Oct 2015, Ingo Molnar wrote:
> >* Keith Busch <[email protected]> wrote:
> >>+config VMDDEV
> >>+ depends on PCI && PCI_DOMAINS && PCI_MSI && GENERIC_MSI_IRQ_DOMAIN &&
> >>IRQ_DOMAIN_HIERARCHY
> >>+ tristate "Volume Management Device Driver"
> >>+ default N
> >>+ select HAVE_VMDDEV
> >>+ ---help---
> >>+ Adds support for the Intel Volume Manage Device (VMD). VMD is
> >>+ a secondary PCI host bridge that allows PCI Express root ports,
> >>+ and devices attached to them, to be removed from the default PCI
> >>+ domain and placed within the VMD domain. If your system provides
> >>+ one of these and has devices attached to it, say "Y".
> >
> >So what this text does not explain is why does the user care? What tangible
> >benefits does this feature offer to users?
>
> Hi Ingo,
>
> The immediate benefit is that devices on VMD domains do not use resources
> on the default PCI domain, so we have more than the 256 buses available.
Would be nice to incorporate that information in the help text and in the
changelog.
Thanks,
Ingo
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