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xen-devel
Re: [Xen-devel] Question regarding SLAB corruption
> Oh! I take it then that the infiniband driver will call sync_single() on
> subsections of a mapped region? I haven't seen that behaviour before and it
> will kill lib/swiotlb.c (the generic Linux swiotlb implementation) just as
> surely as it does the Xen-specific swiotlb!
I guess it is not being hit on non-Xen Linux because mthca sets a
64-bit DMA mask and hence bypasses swiotlb.
However what you point out does seem to be a bug:
Documentation/DMA-API.txt says:
void
dma_sync_single(struct device *dev, dma_addr_t dma_handle, size_t size,
enum dma_data_direction direction)
...
synchronise a single contiguous or scatter/gather mapping. All the
parameters must be the same as those passed into the single mapping
API.
so it seems not really kosher to do on a subsection of a mapping...
I'll take a look at how we can do better here.
- R.
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- Re: [Xen-devel] Question regarding SLAB corruption, (continued)
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption,
Roland Dreier <=
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Roland Dreier
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Roland Dreier
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Roland Dreier
- Re: [Xen-devel] Question regarding SLAB corruption, Lukas Hejtmanek
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
- Re: [Xen-devel] Question regarding SLAB corruption, Keir Fraser
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