On Wed, Nov 18, 2020 at 08:12:43PM +0000, Ashish Kalra wrote: > From: Ashish Kalra <ashish.ka...@amd.com> > > For SEV, all DMA to and from guest has to use shared > (un-encrypted) pages. SEV uses SWIOTLB to make this > happen without requiring changes to device drivers. > However, depending on workload being run, the default > 64MB of SWIOTLB might not be enough and SWIOTLB > may run out of buffers to use for DMA, resulting > in I/O errors and/or performance degradation for > high I/O workloads.
FYI, you can use up 73 chars for your commit log. This looks rather compressed. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
