> On 8 Mar 2026, at 17:39, Herbert J. Skuhra <[email protected]> wrote: > > On Tue, 03 Mar 2026 18:37:57 +0100, Andrew Turner wrote: >> >> The branch main has been updated by andrew: >> >> URL: >> https://cgit.FreeBSD.org/src/commit/?id=c499ad6f997c8c5f61c88925e6d1e826d0c0f6c4 >> >> commit c499ad6f997c8c5f61c88925e6d1e826d0c0f6c4 >> Author: Sarah Walker <[email protected]> >> AuthorDate: 2026-03-03 16:08:11 +0000 >> Commit: Andrew Turner <[email protected]> >> CommitDate: 2026-03-03 16:29:15 +0000 >> >> virtio: Use bus_dma for ring and indirect buffer allocations >> >> While the majority of virtio platforms will be fully coherent, some may >> require cache maintenance or other specific device memory handling (eg for >> secure partitioning). Using bus_dma allows for these usecases. >> >> The virtio buffers are marked as coherent; this should ensure that sync >> calls are no-ops in the common cases. >> >> Reviewed by: andrew >> Sponsored by: Arm Ltd >> Differential Revision: https://reviews.freebsd.org/D54959 >> --- >> sys/dev/virtio/virtio_ring.h | 27 ++++-- >> sys/dev/virtio/virtqueue.c | 216 >> +++++++++++++++++++++++++++++++++++++------ >> 2 files changed, 209 insertions(+), 34 deletions(-) > > After this change I see a lot of "kernel: vtnet0: watchdog timeout on > queue xx" errors on amd64 (arm64 seems to be OK). > > Reverting this commit resolves the issue.
Can you try the change in https://reviews.freebsd.org/D55766? It re-adds memory barriers for amd64. Andrew
