On Thu, Apr 29, 2021 at 10:34 AM Jianxiong Gao <jxgao@xxxxxxxxxx> wrote: > > We observed several NVMe failures when running with SWIOTLB. The root > cause of the issue is that when data is mapped via SWIOTLB, the address > offset is not preserved. Several device drivers including the NVMe > driver relies on this offset to function correctly. > > Even though we discovered the error when running using AMD SEV, we have > reproduced the same error in Rhel 8 without SEV. By adding swiotlb=force > option to the boot command line parameter, NVMe funcionality is > impacted. For example formatting a disk into xfs format returns an > error. Christoph, are you OK with backporting this patch set to LTS, based on the rationale in the cover letter above? Thanks, Marc
