On Wed, 2005-11-30 at 10:36 -0800, Mark Haverkamp wrote: > This patch changes map_single to map_page in compliance with > recommendations made in the IO-Perf howto document to prevent bounce > buffering of DMA requests. Erm, there's a misunderstanding somewhere. You're replacing correct pci_map_single calls with its more difficult to use pci_map_page. This has absolutely zero performance impact and adds the risk that because pci_map_page is more complex to use, someone gets it wrong somewhere. Really, for block devices pci_map_single is the absolutely correct interface. pci_map_page should really only be used by the net stack for packet fragment mapping. James - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
