Re: [Xen-devel] [PATCH-REWORKED] Added xen_is_contiguous_region

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

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




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