Re: [Xen-devel] Question regarding SLAB corruption

To:	Keir Fraser <keir@xxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] Question regarding SLAB corruption
From:	Roland Dreier <rdreier@xxxxxxxxx>
Date:	Mon, 09 Jul 2007 12:21:11 -0700
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Cc:	Lukas Hejtmanek <xhejtman@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
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In-reply-to:	<C2B82D24.12201%keir@xxxxxxxxxxxxx> (Keir Fraser's message of "Mon, 09 Jul 2007 18:21:24 +0100")
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 > By my understanding, the infiniband driver is doing an order-6 allocation,
 > then stuffing that multi-page region into a single element of a scatterlist.
 > It is then calling dma_map_sg(), which [on Xen] calls swiotlb_map_sg(),
 > which calls map_single() on that multi-page extent. Am I misunderstanding
 > something?

Don't know about the Xen part but you are correct about the mthca
driver part.  And as far as I know it is perfectly fine to put order>0
pages into a scatterlist...

 - R.

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Re: [Xen-devel] Question regarding SLAB corruption