CVS commit: [netbsd-10] src/sys/dev/pci

["Martin Husemann" <martin%netbsd.org@localhost>]

Module Name:    src
Committed By:   martin
Date:           Fri Jan 13 19:11:31 UTC 2023

Modified Files:
        src/sys/dev/pci [netbsd-10]: virtio.c

Log Message:
Pull up following revision(s) (requested by jakllsch in ticket #48):

        sys/dev/pci/virtio.c: revision 1.64
        sys/dev/pci/virtio.c: revision 1.65

Fix dmamap_syncs more; the number of ring elements is vq->vq_num, not
sc->sc_nvqs.

Subtly adjust criteria for notification of Virtio devices in
VIRTIO_F_RING_EVENT_IDX mode.

This fixes stalls in the vioif(4) transmit path that would happen sooner
or later, depending on interface transmit utilization, and were
particularly noticable with a NetBSD guest transmitting to its x86 KVM
host at multi-gigabit speeds.


To generate a diff of this commit:
cvs rdiff -u -r1.63 -r1.63.2.1 src/sys/dev/pci/virtio.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.