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Re: [Xen-devel] [PATCH-REWORKED] Added xen_is_contiguous_region
| To: | "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH-REWORKED] Added xen_is_contiguous_region |
| 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:
As indicated in the therad ( http://lists.xensource.com/archives/html/xen-devel/2007-04/msg00135.html ) 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 pool. 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. Jambunathan K.
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