Re: [Xen-devel] [PATCH] Align PCI memory regions to page size (4K) (Dom-0 Patch)

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 30/10/07 16:34, "Barak Fargoun" <barak@xxxxxxxxxxxx> wrote:

> Add a boot parameter to Dom-0 kernel ('pci-mem-align') which forces PCI
> memory regions to be aligned to 4K.
> 
> In PCI pass-through the mmio resources are mapped/translated from pfns
> to mfns (page size), so mmio resources should be at least page-aligned

The only resources you're changing in this patch are the software resource
lists that Linux maintains, presumably for diagnostics and to detect
resource conflicts. No actual PCI BARs seem to change, or anything like
that. So I don't see how this would fix anything. Actually I'm not even
entirely clear what the problem is.

 -- Keir



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