Just upgraded 7.7 -> 7.8
Noticed 2 regressions on devices that worked immediately before the upgrade.

com0 embedded uart worked -almost- ok in 7.7

Oct 31 17:58:30 eight /bsd: com0: 3 silo overflows, 0 ibuf overflows

now

Nov  1 02:00:59 eight /bsd: com0: 51 silo overflows, 0 ibuf overflows

The embedded uart is a little tricky
The port is connected to a GPS receiver @9600 baud sending 2 lines once 
a second.

rge0 worked perfectly in 7.7 (and was used to do sysupgrade)

Oct  9 13:25:26 eight /bsd: rge0 at pci3 dev 0 function 0 "Realtek 
RTL8125" rev
0x00: msix, address 78:2d:7e:12:5a:d9

now

Nov  1 01:43:45 eight /bsd: rge0 at pci3 dev 0 function 0 "Realtek 
RTL8125" rev
0x00: msixrge0: failed to stop all requests

If anyone suggests a patch or a test I'll gladly try it.
thanks
Geoff Steckel

dmesg:

OpenBSD 7.8 (GENERIC.MP) #54: Sun Oct 12 12:58:11 MDT 2025
deraadt@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 67997847552 (64847MB)
avail mem = 65909653504 (62856MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 3.3 @ 0xe6cc0 (33 entries)
bios0: vendor American Megatrends International, LLC. version "P2.10" 
date 08/02/2021
bios0: ASRock B550 Phantom Gaming 4
efi0 at bios0: UEFI 2.7
efi0: American Megatrends rev 0x50011
acpi0 at bios0: ACPI 6.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SSDT SSDT SSDT FIDT MCFG AAFT HPET TPM2 SSDT 
CRAT CDIT SSDT SSDT SSDT SSDT WSMT APIC SSDT SSDT SSDT SSDT FPD
T
acpi0: wakeup devices GP17(S4) XHC0(S4) XHC1(S4) PS2K(S3) GPP0(S4) 
GPP3(S4) PTXH(S4) PT20(S4) PT24(S4) PT26(S4) PT27(S4) PT28(S4) PT
29(S4)
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimcfg0 at acpi0
acpimcfg0: addr 0xf0000000, bus 0-127
acpihpet0 at acpi0: 14318180 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu0: cpuid 1 
edx=178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT> 
ecx
=76d8320b<SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND>
cpu0: cpuid 6 eax=4<ARAT> ecx=1<EFFFREQ>
cpu0: cpuid 7.0 
ebx=219c97a9<FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,PQM,RDSEED,ADX,SMAP,CLFLUSHOPT,CLWB,SHA> 
ecx=40068c<UMIP,PKU>
  edx=10
cpu0: cpuid d.1 eax=f<XSAVEOPT,XSAVEC,XGETBV1,XSAVES>
cpu0: cpuid 80000001 edx=2fd3fbff<NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG> 
ecx=75c237ff<LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DN
OWP,OSVW,IBS,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX>
cpu0: cpuid 80000007 edx=6799<HWPSTATE,ITSC>
cpu0: cpuid 80000008 
ebx=191ef657<IBPB,IBRS,STIBP,STIBP_ALL,IBRS_PREF,IBRS_SM,SSBD>
cpu0: cpuid 8000001F 
eax=1780f<SME,SEV,PFLUSH_MSR,SEVES,REQ64BITHOST,RESTINJ,ALTINJ,DBGSTSW,VTE> 
edx=1
cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 512KB 
64b/line 8-way L2 cache, 16MB 64b/line 16-way L3 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 100MHz
cpu0: mwait min=64, max=64, C-substates=1.1, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 4 (application processor)
cpu2: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 6 (application processor)
cpu3: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu3: smt 0, core 3, package 0
cpu4 at mainbus0: apid 8 (application processor)
cpu4: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu4: smt 0, core 4, package 0
cpu5 at mainbus0: apid 10 (application processor)
cpu5: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu5: smt 0, core 5, package 0
cpu6 at mainbus0: apid 1 (application processor)
cpu6: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu6: smt 1, core 0, package 0
cpu7 at mainbus0: apid 3 (application processor)
cpu7: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu7: smt 1, core 1, package 0
cpu8 at mainbus0: apid 5 (application processor)
cpu8: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu8: smt 1, core 2, package 0
cpu9 at mainbus0: apid 7 (application processor)
cpu9: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu9: smt 1, core 3, package 0
cpu10 at mainbus0: apid 9 (application processor)
cpu10: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu10: smt 1, core 4, package 0
cpu11 at mainbus0: apid 11 (application processor)
cpu11: AMD Ryzen 5 5600G with Radeon Graphics, 3900.00 MHz, 19-50-00, 
patch 0a500012
cpu11: smt 1, core 5, package 0
ioapic0 at mainbus0: apid 13 pa 0xfec00000, version 21, 24 pins
ioapic1 at mainbus0: apid 14 pa 0xfec01000, version 21, 32 pins
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (GPP6)
acpiprt2 at acpi0: bus -1 (GPP7)

acpiprt3 at acpi0: bus -1 (GPP8)
acpiprt4 at acpi0: bus -1 (GPP9)
acpiprt5 at acpi0: bus 6 (GP17)
acpiprt6 at acpi0: bus -1 (GPP0)
acpiprt7 at acpi0: bus -1 (GP18)
acpiprt8 at acpi0: bus 5 (GPP4)
acpiprt9 at acpi0: bus -1 (GPP5)
acpiprt10 at acpi0: bus 1 (GPP3)
acpipci0 at acpi0 PCI0: 0x00000010 0x00000011 0x00000000
acpicmos0 at acpi0
com0 at acpi0 UAR1 addr 0x3f8/0x8 irq 4: ns16550a, 16 byte fifo
"PNP0303" at acpi0 not configured
acpibtn0 at acpi0: PWRB
amdgpio0 at acpi0 GPIO uid 0 addr 0xfed81500/0x400 irq 7, 184 pins
tpm0 at acpi0 TPM_: unsupported TPM2 start method 2
"ACPI0010" at acpi0 not configured
acpicpu0 at acpi0: C1(@1 halt!), PSS
acpicpu1 at acpi0: C1(@1 halt!), PSS
acpicpu2 at acpi0: C1(@1 halt!), PSS
acpicpu3 at acpi0: C1(@1 halt!), PSS
acpicpu4 at acpi0: C1(@1 halt!), PSS
acpicpu5 at acpi0: C1(@1 halt!), PSS
acpicpu6 at acpi0: C1(@1 halt!), PSS
acpicpu7 at acpi0: C1(@1 halt!), PSS
acpicpu8 at acpi0: C1(@1 halt!), PSS
acpicpu9 at acpi0: C1(@1 halt!), PSS
acpicpu10 at acpi0: C1(@1 halt!), PSS
acpicpu11 at acpi0: C1(@1 halt!), PSS
"AMDIF030" at acpi0 not configured
"PNP0C14" at acpi0 not configured
acpipwrres0 at acpi0: PRWL
acpivideo0 at acpi0: VGA_
acpivout0 at acpivideo0: LCD_
cpu0: 3900 MHz: speeds: 3900 1700 1400 MHz
pci0 at mainbus0 bus 0
ksmn0 at pci0 dev 0 function 0 "AMD 17h/6xh Root Complex" rev 0x00
pchb0 at pci0 dev 1 function 0 "AMD 17h/6xh Host" rev 0x00
pchb1 at pci0 dev 2 function 0 "AMD 17h/6xh Host" rev 0x00
ppb0 at pci0 dev 2 function 1 "AMD 17h/6xh PCIE" rev 0x00: msi
pci1 at ppb0 bus 1
xhci0 at pci1 dev 0 function 0 "AMD 500 Series xHCI" rev 0x00: msix, 
xHCI 1.10
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "AMD xHCI root hub" rev 
3.00/1.00 addr 1
ahci0 at pci1 dev 0 function 1 "AMD 500 Series AHCI" rev 0x00: msi, AHCI 
1.3.1
ahci0: port busy after first PMP probe FIS
ahci0: port busy after first PMP probe FIS
ahci0: port 0: 6.0Gb/s
ahci0: port busy after first PMP probe FIS
ahci0: port busy after first PMP probe FIS
ahci0: port 1: 6.0Gb/s
ahci0: port busy after first PMP probe FIS
ahci0: port busy after first PMP probe FIS
ahci0: port 2: 6.0Gb/s
ahci0: port busy after first PMP probe FIS
ahci0: port busy after first PMP probe FIS
ahci0: port 3: 6.0Gb/s
ahci0: port busy after first PMP probe FIS
ahci0: port busy after first PMP probe FIS
ahci0: port 4: 6.0Gb/s
ahci0: port busy after first PMP probe FIS
ahci0: port busy after first PMP probe FIS
ahci0: port 5: 1.5Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, Samsung SSD 870, SVT0> 
naa.5002538f55406711
sd0: 953869MB, 512 bytes/sector, 1953525168 sectors, thin
sd1 at scsibus1 targ 1 lun 0: <ATA, TOSHIBA HDWG180, 0603> 
naa.5000039aa8d12305
sd1: 7630885MB, 512 bytes/sector, 15628053168 sectors
sd2 at scsibus1 targ 2 lun 0: <ATA, ST20000NM007D-3D, SN01> 
naa.5000c500e5d5213d
sd2: 19074048MB, 512 bytes/sector, 39063650304 sectors
sd3 at scsibus1 targ 3 lun 0: <ATA, ST14000NM001G-2K, SN03> 
naa.5000c500c80be52a
sd3: 13351936MB, 512 bytes/sector, 27344764928 sectors
sd4 at scsibus1 targ 4 lun 0: <ATA, ST8000NM017B-2TJ, SN01> 
naa.5000c500e47bc8b0
sd4: 7630885MB, 512 bytes/sector, 15628053168 sectors
cd0 at scsibus1 targ 5 lun 0: <PIONEER, BD-RW BDR-212D, 1.02> removable
ppb1 at pci1 dev 0 function 2 "AMD 500 Series PCIE" rev 0x00
pci2 at ppb1 bus 2
ppb2 at pci2 dev 6 function 0 "AMD 500 Series PCIE" rev 0x00: msi
pci3 at ppb2 bus 3
rge0 at pci3 dev 0 function 0 "Realtek RTL8125" rev 0x00: msixrge0: 
failed to stop all requests

ppb3 at pci2 dev 8 function 0 "AMD 500 Series PCIE" rev 0x00: msi
pci4 at ppb3 bus 4
re0 at pci4 dev 0 function 0 "Realtek 8168" rev 0x15: RTL8168H/8111H 
(0x5400), msi, address 70:85:c2:96:b0:5c
rgephy0 at re0 phy 7: RTL8251, rev. 0
ppb4 at pci0 dev 2 function 2 "AMD 17h/6xh PCIE" rev 0x00: msi
pci5 at ppb4 bus 5
nvme0 at pci5 dev 0 function 0 "SanDisk SN850X" rev 0x01: msix, NVMe 1.4
nvme0: WD_BLACK SN850X HS 4000GB, firmware 624361WD, serial 24402M800314
scsibus2 at nvme0: 2 targets, initiator 0
sd5 at scsibus2 targ 1 lun 0: <NVMe, WD_BLACK SN850X, 6243>
sd5: 3815447MB, 512 bytes/sector, 7814037168 sectors
pchb2 at pci0 dev 8 function 0 "AMD 17h/6xh Host" rev 0x00
ppb5 at pci0 dev 8 function 1 "AMD 17h/6xh PCIE" rev 0x00
pci6 at ppb5 bus 6
amdgpu0 at pci6 dev 0 function 0 "ATI Cezanne" rev 0xc9
drm0 at amdgpu0
amdgpu0: msi
azalia0 at pci6 dev 0 function 1 "ATI Renoir HD Audio" rev 0x00: msi
azalia0: no supported codecs
ccp0 at pci6 dev 0 function 2 "AMD 17h/1xh Crypto" rev 0x00
xhci1 at pci6 dev 0 function 3 "AMD 17h/6xh xHCI" rev 0x00: msix, xHCI 1.10
usb1 at xhci1: USB revision 3.0
uhub1 at usb1 configuration 1 interface 0 "AMD xHCI root hub" rev 
3.00/1.00 addr 1
xhci2 at pci6 dev 0 function 4 "AMD 17h/6xh xHCI" rev 0x00: msix, xHCI 1.10
usb2 at xhci2: USB revision 3.0
uhub2 at usb2 configuration 1 interface 0 "AMD xHCI root hub" rev 
3.00/1.00 addr 1
azalia1 at pci6 dev 0 function 6 "AMD 17h/1xh HD Audio" rev 0x00: msi
azalia1: codecs: Realtek ALC1200
audio0 at azalia1
piixpm0 at pci0 dev 20 function 0 "AMD FCH SMBus" rev 0x51: polling
iic0 at piixpm0
iic1 at piixpm0
pcib0 at pci0 dev 20 function 3 "AMD FCH LPC" rev 0x51
pchb3 at pci0 dev 24 function 0 "AMD 19h/5xh Data Fabric" rev 0x00
pchb4 at pci0 dev 24 function 1 "AMD 19h/5xh Data Fabric" rev 0x00
pchb5 at pci0 dev 24 function 2 "AMD 19h/5xh Data Fabric" rev 0x00
pchb6 at pci0 dev 24 function 3 "AMD 19h/5xh Data Fabric" rev 0x00
pchb7 at pci0 dev 24 function 4 "AMD 19h/5xh Data Fabric" rev 0x00
pchb8 at pci0 dev 24 function 5 "AMD 19h/5xh Data Fabric" rev 0x00
pchb9 at pci0 dev 24 function 6 "AMD 19h/5xh Data Fabric" rev 0x00
pchb10 at pci0 dev 24 function 7 "AMD 19h/5xh Data Fabric" rev 0x00
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: SVM/RVI
efifb at mainbus0 not configured
uplcom0 at uhub0 port 6 configuration 1 interface 0 "Prolific Technology 
Inc. USB-Serial Controller D" rev 1.10/4.00 addr 2
ucom0 at uplcom0: usb0.0.00006.0
uhidev0 at uhub0 port 14 configuration 1 interface 0 "ASRock LED 
Controller" rev 1.10/0.00 addr 3
uhidev0: iclass 3/0
uhid0 at uhidev0: input=64, output=64, feature=0
uaudio0 at uhub1 port 1 configuration 1 interface 1 "Burr-Brown from TI 
USB Audio CODEC" rev 1.10/1.00 addr 2
uaudio0: class v1, full-speed, sync, channels: 2 play, 2 rec, 3 ctls
audio1 at uaudio0
uhidev1 at uhub1 port 1 configuration 1 interface 3 "Burr-Brown from TI 
USB Audio CODEC" rev 1.10/1.00 addr 2
uhidev1: iclass 3/0
ucc0 at uhidev1: 3 usages, 3 keys, enum
wskbd1 at ucc0 mux 1
uhub3 at uhub2 port 1 configuration 1 interface 0 "VIA Labs, Inc. USB2.0 
Hub" rev 2.10/90.80 addr 2
uhidev2 at uhub3 port 1 configuration 1 interface 0 "Logitech USB 
Trackball" rev 1.10/14.00 addr 3
uhidev2: iclass 3/1
ums0 at uhidev2: 5 buttons
wsmouse0 at ums0 mux 0
uhub4 at uhub2 port 5 configuration 1 interface 0 "VIA Labs, Inc. USB3.0 
Hub" rev 3.00/90.84 addr 4
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
root on sd5a (0bb22fb1020f96a6.a) swap on sd5b dump on sd5b
amdgpu0: GREEN_SARDINE GC 9.3.0 7 CU rev 0x00
amdgpu0: 1920x1200, 32bpp
wsdisplay0 at amdgpu0 mux 1: console (std, vt100 emulation), using wskbd0
wskbd1: connecting to wsdisplay0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
com0: 68 silo overflows, 0 ibuf overflows
com0: 48 silo overflows, 0 ibuf overflows
com0: 60 silo overflows, 0 ibuf overflows
com0: 63 silo overflows, 0 ibuf overflows
com0: 54 silo overflows, 0 ibuf overflows
com0: 57 silo overflows, 0 ibuf overflows
com0: 56 silo overflows, 0 ibuf overflows
com0: 62 silo overflows, 0 ibuf overflows
com0: 66 silo overflows, 0 ibuf overflows