CVS commit: src/sys/dev/pci

["Jonathan A. Kollasch" <jakllsch%netbsd.org@localhost>]

Module Name:    src
Committed By:   jakllsch
Date:           Tue Jan  3 19:33:32 UTC 2023

Modified Files:
        src/sys/dev/pci: virtio.c

Log Message:
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 -r1.64 -r1.65 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.