Re: [PATCH V3 13/13] HV/Storvsc: Add Isolation VM support for storvsc driver
From: "hch@lst.de" <hch@lst.de>
Date: 2021-08-24 08:46:59
Also in:
linux-arch, linux-hyperv, linux-iommu, linux-scsi, netdev, xen-devel
On Sat, Aug 21, 2021 at 02:04:11AM +0800, Tianyu Lan wrote:
After dma_map_sg(), we still need to go through scatter list again to populate payload->rrange.pfn_array. We may just go through the scatter list just once if dma_map_sg() accepts a callback and run it during go through scatter list.
Iterating a cache hot array is way faster than doing lots of indirect calls.