Like the last snapshots, the current bsd.mp crashes my Dell 330
workstation (SMP board, only one CPU installed). I sent a couple of
reports when testing the snapshots, but I'm not sure whether you are
interested in testing -current kernels as well as snapshots. FWIW,
results are the same:

i386 dmesg:

OpenBSD 3.5-current (GENERIC) #116: Tue Jun 15 18:40:28 CDT 2004
eperea@herakles.walkereng.net:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: Intel(R) Pentium(R) 4 CPU 1500MHz ("GenuineIntel" 686-class) 1.50 GHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,P GE,MCA,CMOV,PAT,PSE36,CFLUSH,ACPI,MMX,FXSR,SSE,SSE 2,SS,HTT,TM
real mem = 535961600 (523400K)
avail mem = 488558592 (477108K)
using 4278 buffers containing 26902528 bytes (26272K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(00) BIOS, date 06/06/01, BIOS32 rev. 0 @ 0xffe90
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 @ 0xf0000/0x10000
pcibios0: PCI IRQ Routing Table rev. 1.0 @ 0xfbbb0/176 (9 entries)
pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82801BA LPC" rev 0x00)
pcibios0: PCI bus #2 is the last bus
bios0: ROM list: 0xc0000/0xa800 0xca800/0x5800
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Intel 82850 Host" rev 0x02
ppb0 at pci0 dev 1 function 0 "Intel 82850/82860 AGP" rev 0x02
pci1 at ppb0 bus 1
vga1 at pci1 dev 0 function 0 "Nvidia GeForce2 GTS" rev 0xa4
wsdisplay0 at vga1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
ppb1 at pci0 dev 30 function 0 "Intel 82801BA AGP" rev 0x04
pci2 at ppb1 bus 2
ahc1 at pci2 dev 10 function 0 "Adaptec AHA-2940U2 U2" rev 0x00: irq 11
scsibus0 at ahc1: 16 targets
sd0 at scsibus0 targ 0 lun 0: <SEAGATE, ST39102LW, 0005> SCSI2 0/direct fixed
sd0: 8683MB, 6962 cyl, 12 head, 212 sec, 512 bytes/sec, 17783240 sec total
sd1 at scsibus0 targ 2 lun 0: <SEAGATE, ST336705LW, 5063> SCSI3 0/direct fixed
sd1: 35003MB, 19036 cyl, 8 head, 470 sec, 512 bytes/sec, 71687370 sec total
xl0 at pci2 dev 12 function 0 "3Com 3c905C 100Base-TX" rev 0x78: irq 11, address 00:06:5b:1b:22:6a
exphy0 at xl0 phy 24: 3Com internal media interface
ichpcib0 at pci0 dev 31 function 0 "Intel 82801BA LPC" rev 0x04
pciide0 at pci0 dev 31 function 1 "Intel 82801BA IDE" rev 0x04: DMA, channel 0 wired to compatibility, channel 1 wired to compatibility
wd0 at pciide0 channel 0 drive 0: <IC35L040AVER07-0>
wd0: 16-sector PIO, LBA, 38166MB, 78165360 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 5
atapiscsi0 at pciide0 channel 1 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <Lite-On, LTN486 48x Max, YD01> SCSI0 5/cdrom removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
uhci0 at pci0 dev 31 function 2 "Intel 82801BA USB" rev 0x04: irq 11
usb0 at uhci0: USB revision 1.0
uhub0 at usb0
uhub0: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub0: 2 ports with 2 removable, self powered
"Intel 82801BA SMBus" rev 0x04 at pci0 dev 31 function 3 not configured
uhci1 at pci0 dev 31 function 4 "Intel 82801BA USB2" rev 0x04: irq 9
usb1 at uhci1: USB revision 1.0
uhub1 at usb1
uhub1: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub1: 2 ports with 2 removable, self powered
auich0 at pci0 dev 31 function 5 "Intel 82801BA AC97 Audio" rev 0x04: irq 10, ICH2 AC97
ac97: codec id 0x41445360 (Analog Devices AD1885)
ac97: codec features headphone, Analog Devices Phat Stereo
audio0 at auich0
auich0: measured ac97 link rate at 55947 Hz
isa0 at ichpcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pmsi0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pmsi0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
sysbeep0 at pcppi0
lpt0 at isa0 port 0x378/4 irq 7
npx0 at isa0 port 0xf0/16: using exception 16
pccom0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
pccom1 at isa0 port 0x2f8/8 irq 3: ns16550a, 16 byte fifo
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
fd0 at fdc0 drive 0: 1.44MB 80 cyl, 2 head, 18 sec
biomask eb65 netmask eb65 ttymask fbe7
pctr: user-level cycle counter enabled
ahc1: target 0 using 16bit transfers
ahc1: target 0 synchronous at 20.0MHz, offset = 0xf
dkcsum: sd0 matched BIOS disk 80
ahc1: target 2 using 16bit transfers
ahc1: target 2 synchronous at 20.0MHz, offset = 0x3f
dkcsum: sd1 matched BIOS disk 82
wd0: no disk label
dkcsum: wd0 matched BIOS disk 81
root on sd0a
rootdev=0x400 rrootdev=0xd00 rawdev=0xd02
arpresolve: can't allocate llinfo
[last message repeats]

*----------------------------------------------------------------------*

i386.mp:

[ using 429256 bytes of bsd ELF symbol table ]
Stopped at Debugger+0x4: leave
CPU 0 entering ddb
ddb{0}>
ddb{0}> w mp_verbose 1
mp_verbose 0 = 0x1
ddb{0}> c
CPU 0 leaving ddb
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
Copyright (c) 1995-2004 OpenBSD. All rights reserved. http://www.OpenBSD.org

OpenBSD 3.5-current (GENERIC.MP) #5: Tue Jun 15 18:50:27 CDT 2004
eperea@herakles.walkereng.net:/usr/s...ile/GENERIC.MP
cpu0: Intel(R) Pentium(R) 4 CPU 1500MHz ("GenuineIntel" 686-class) 1.50 GHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,P GE,MCA,CMOV,PAT,PSE36,CFLUSH,ACPI,MMX,FXSR,SSE,SSE 2,SS,HTT,TM
real mem = 535961600 (523400K)
avail mem = 488497152 (477048K)
using 4278 buffers containing 26902528 bytes (26272K) of memory
mainbus0 (root)
bios0 at mainbus0: AT/286+(00) BIOS, date 06/06/01, BIOS32 rev. 0 @ 0xffe90
apm0 at bios0: Power Management spec V1.2
apm0: AC on, battery charge unknown
pcibios0 at bios0: rev. 2.1 @ 0xf0000/0x10000
pcibios0: PCI IRQ Routing Table rev. 1.0 @ 0xfbbb0/176 (9 entries)
pcibios0: PCI Interrupt Router at 000:31:0 ("Intel 82801BA LPC" rev 0x00)
pcibios0: PCI bus #2 is the last bus
bios0: ROM list: 0xc0000/0xa800 0xca800/0x5800
mainbus0: scanning 0x9fc00 to 0x9fff0 for MP signature
mainbus0: scanning 0x9f400 to 0x9f7f0 for MP signature
mainbus0: scanning 0xf0000 to 0xffff0 for MP signature
mainbus0: MP floating pointer found in bios at 0xfe710
mainbus0: MP config table at 0xf0000, 44 bytes long
mainbus0: Intel MP Specification (Version 1.4) (DELL WS 330 )
panic: TLB IPI rendezvous failed (mask 1)
Stopped at Debugger+0x4: leave
RUN AT LEAST 'trace' AND 'ps' AND INCLUDE OUTPUT WHEN REPORTING THIS PANIC!
DO NOT EVEN BOTHER REPORTING THIS WITHOUT INCLUDING THAT INFORMATION!
CPU 240 entering ddb
ddb{240}> trace
Debugger(0,d0676540,5f5e102,d03143b2,0) at Debugger+0x4
panic(d04d1b20,1,0,e,e774a000) at panic+0x87
pmap_tlb_shootnow(1,e7749000,fe121,d06e2e04,e774a0 2c) at pmap_tlb_shootnow+0xc2

pmap_kremove(e7749000,1000,1,2c,d06e2ea8,d104afc0, d059a514,d0331808,d06e2ea8,d1
04afc0,0,0,e774a02c,e7749000,1000,0,0,1000,d06e2ec 8,d03316f4,d104afc0,73,d04acd
28,d05ca620,d058b64c,d104afc0,d059a514,0,4,0,d06e2 ec8,d01f3ead,d04acd1f,5,d06e2
ec8,d01f3f12,0,d04cd1c0,d04de12d,d01f3ec0,0,1,d059 a514,0,d103dfc0,d059a514,d06e
2f08,d01ef642,0,d104afc0,0,8,0,d04cd1c0,d05ca068,d 030ae49,0,0,d0589270,0,d104af
d4,d059a4fc,d06e2f38) at pmap_kremove+0x78
mpbios_scan(d104afc0,73,d04acd28,d05ca620,d058b64c ) at mpbios_scan+0x367
mainbus_attach(0,d104afc0,0,8,0,d04cd1c0,d05ca068, d030ae49,0,0,d0589270,0,d104a
fd4,d059a4fc,d06e2f38,d01ef4f2,0,d0589270,0,0,9,d0 5c9ee0,60,d03ff15c,9,d05c9ee0
,d06e2f58,d0307b4f,d04cd1c0,0,d06e2f58,d0307b40,9, d05c9ee0,d06e2fa8,d01dc76d,0,
1,3,0,d06e0010,6e0000,6e7000,0,0,0,0,10,d06e2fa0,d 06e2f98,2,62a007ff,d05e,0,0,d
01004bf,0,0,0,0,0) at mainbus_attach+0x58
config_attach(0,d0589270,0,0,9) at config_attach+0x146
config_rootfound(d04cd1c0,0,d06e2f58,d0307b40) at config_rootfound+0x3e
cpu_configure(0,1,3,0,d06e0010,6e0000,6e7000,0,0,0 ,0,10,d06e2fa0,d06e2f98,2,62a
007ff,d05e,0,0,d01004bf,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
,0,0,0,0,0,0,0,0,0,0,0,0,0) at cpu_configure+0x1f
main(0,0,0,0,0) at main+0x32d
ddb{240}> ps
PID PPID PGRP UID S FLAGS WAIT COMMAND
* 0 -1 0 0 7 0x80204 swapper
ddb{240}>