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Re: [Xen-devel] remove the ->mapping_error method from dma_map_ops V2
- To: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Thu, 29 Nov 2018 19:55:37 +0100
- Cc: linux-arch@xxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, David Woodhouse <dwmw2@xxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Russell King - ARM Linux <linux@xxxxxxxxxxxxxxx>, Linux List Kernel Mailing <linux-kernel@xxxxxxxxxxxxxxx>, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, robin.murphy@xxxxxxx, Christoph Hellwig <hch@xxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 29 Nov 2018 18:55:45 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Thu, Nov 29, 2018 at 10:53:32AM -0800, Linus Torvalds wrote:
> Most of the high-performance IO is already using SG lists anyway, no?
> Disk/networking/whatever.
Networking basically never uses S/G lists. Block I/O mostly uses it,
and graphics / media seems to have a fair amount of S/G uses, including
very, erm special ones.
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