Re: kern/60144: virtio(4) cache coherence issue

["Taylor R Campbell via gnats" <gnats-admin%NetBSD.org@localhost>]

The following reply was made to PR kern/60144; it has been noted by GNATS.

From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
To: Tetsuya Isaki <isaki%pastel-flower.jp@localhost>
Cc: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>, thorpej%me.com@localhost,
	nick.hudson%gmx.co.uk@localhost, gnats-bugs%netbsd.org@localhost,
	kern-bug-people%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, adrian%NetBSD.org@localhost
Subject: Re: kern/60144: virtio(4) cache coherence issue
Date: Fri, 22 May 2026 15:08:59 +0000

 > Date: Fri, 22 May 2026 13:48:30 +0900
 > From: Tetsuya Isaki <isaki%pastel-flower.jp@localhost>
 >=20
 > At Mon, 18 May 2026 23:29:58 +0000,
 > Taylor R Campbell wrote:
 > > Isaki-san: Can you verify that this patch works?
 >=20
 > It worked with these three patches applied.  Thank you!
 > - sys/arch/virt68k/virt68k/bus_dma.c,v 1.5 (I tested it on -11)
 > - sys/dev/pci/ld_virtio.c (from kern/60182)
 > - sys/dev/pci/virtio.c (this patch)
 
 Great, thanks!
 
 > By the way, one spurious interrupt has still occurred.
 >=20
 > ...
 > virtio1: allocated 24576 byte for virtqueue 0 for I/O request, size 32
 > virtio1: using 16384 byte (1024 entries) indirect descriptors
 > virtio1: interrupting at gfpic4 irq 2 (IPL 5)
 > ld1: 8192 MB, 4161 cyl, 64 head, 63 sec, 512 bytes/sect x 16777216 sector=
 s (0 bytes/physsect)
 > Spurious interrupt on CPU ipl 5
 
 Just to confirm, is there anything else at gfpic4 irq 2 ipl 5, or is
 the interrupt definitely meant for, but not acknowledged by, virtio1?