Re: [PATCH] virtio: Define and use per-architecture "pfn shift" constants

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Hollis Blanchard wrote:
# HG changeset patch
# User Hollis Blanchard <hollisb@xxxxxxxxxx>
# Date 1225946980 21600
# Node ID f58566dfe20e841604e1377ff41e9e0501c1cf18
# Parent  f776b102380286dd173a3b89f7dc976140812517
virtio: Define and use per-architecture "pfn shift" constants

Both sides of the virtio interface must agree about how big a pfn really is.
This is particularly an issue on architectures where the page size is
configurable (e.g. PowerPC, IA64) -- the interface must be independent of
PAGE_SHIFT.

This patch should have no functional effect on x86 or ia64, but an ack from the IA64 guys
would be good because I'm not clear on their page size requirements.

Signed-off-by: Hollis Blanchard <hollisb@xxxxxxxxxx>


This is missing a fix for virtio-balloon.

Regards,

Anthony Liguori


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