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Re: [Xen-devel] [PATCH-REWORKED] Added xen_is_contiguous_region
- To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
- From: "Jambunathan K" <kjambunathan@xxxxxxxxx>
- Date: Sat, 14 Apr 2007 01:26:16 +0530
- Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 13 Apr 2007 12:54:55 -0700
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On 4/14/07, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
What are you trying to do? There's no reasoning behind this patch, nor any sign off.
As indicated in the therad (
our driver has a 35-bit mask and
maintains it's own bounce pools. Our experience with native linux is
that this arrangement scales well as against using the shared system
pci_map_single as it stands today sneaks a swiotlb buffer underneath us
and we end up implicitly falling back upon the shared pool.
Using the new xen_is_contiguous_region() would enable our driver to fall back upon it's own pool.
This is my first patch to Xen. If you approve of the patch, I will resubmit the changes as required by you.
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