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Re: [Xen-devel] [PATCH-REWORKED] Added xen_is_contiguous_region
| To: | Jambunathan K <kjambunathan@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH-REWORKED] Added xen_is_contiguous_region |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Sat, 14 Apr 2007 07:52:18 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Fri, 13 Apr 2007 23:49:37 -0700 |
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| Thread-index: | Acd+YXE7r5sCHupUEdueEwAWy6hiGQ== |
| Thread-topic: | [Xen-devel] [PATCH-REWORKED] Added xen_is_contiguous_region |
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On 14/4/07 05:56, "Jambunathan K" <kjambunathan@xxxxxxxxx> wrote: > But I had seen a crash in DomU (with no swiotlb) when we try to pci_map_single > a alloc_skb buffer. > > In Xen-3.0.4, alloc_skb in all probability allocs a contig buffer but > it wouldn't > guarantee me the same. With Xen-3.0.5, with bit-width based allocator > we are much > more likely to succeed compared to system-wide functions that cater to least > common denominator. We stripped out all our own custom alloc_skb code in 3.0.5. Hence alloc_skb() now will not return contiguous buffers. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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