>Synopsis: race between kqueue vnode note for writes triggering reads on a
>pre-mmapped file segment
>Category: kernel
>Environment:
System : OpenBSD 5.9
Details : OpenBSD 5.9 (GENERIC) #1761: Fri Feb 26 01:15:04 MST 2016
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
Architecture: OpenBSD.amd64
Machine : amd64
>Description:
On both UFS and tmpfs, if you watch for updates to the file with
kqueue, and pre-mmap a segment of the file, using the kqueue data to notify of
updates to the file crusor, and append the file in a separate process, the
written contents will populate AFTER the kqueue event is received, and is
starting to be read. Part of the end of the read (of mapped memory) will still
have 0s until the write completes.
I originally reported this on tmpfs on DragonFly. You can see their fix here:
http://lists.dragonflybsd.org/pipermail/commits/2015-July/418895.html
I had originally used this technique on HAMMER, and it worked, then used tmpfs
on Dragonfly, and it didn't work until fixed. It also works in Linux using
inotify with both ext4 and tmpfs. It works on OS X with a memory disk and
kqueue. I am now testing on OpenBSD, and will keep testing environments to make
sure this technique works everywhere, since I have a cross-platform framework
to test with.
I am not sure if there is any standard or documented API that says that this
should work, other than writes are not being atomic in this special case.
Shared memory isn't expected to be atomically written to, but the notification
is also not atomic with the write, and it could be designed to be atomic with
the write, hopefully without significant impact on performance or code
complexity.
>How-To-Repeat:
I have prooprietary software that can easily reproduce, so I can test
patches. I hope to free the source if I can get my way, but no decision has
been made on that yet. I haven't written a small open test case yet, but I
could if needed. The steps are:
1. write a program to:
1.a. open a file.
1.b. memory map beyond its end. Use MAP_SHARED to see outside writes.
1.c. register a kqueue event for vnode writes to the file.
1.d. poll for that event.
1.e. when the event comes, read the memory beyond the end of the file, up to
the length passed in the kqueue event data field.
1.f. verify the read memory
2. In a separate program, write something non-zero to the end of the file to
trigger the write event in the first program.
The non-zero content should (probably?) be fully available in memory
immediately after the kqueue event is received.
>Fix:
This is the commit that fixes tmpfs in DragonFly, but it may be very different:
http://lists.dragonflybsd.org/pipermail/commits/2015-July/418895.html
dmesg:
OpenBSD 5.9 (GENERIC) #1761: Fri Feb 26 01:15:04 MST 2016
dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC
real mem = 1056899072 (1007MB)
avail mem = 1020764160 (973MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.5 @ 0xe1000 (10 entries)
bios0: vendor innotek GmbH version "VirtualBox" date 12/01/2006
bios0: innotek GmbH VirtualBox
acpi0 at bios0: rev 2
acpi0: sleep states S0 S5
acpi0: tables DSDT FACP APIC SSDT
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) M-5Y31 CPU @ 0.90GHz, 1100.23 MHz
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,PCLMUL,MWAIT,SSSE3,CX16,SSE4.1,SSE4.2,MOVBE,POPCNT,AES,XSAVE,AVX,RDRAND,NXE,LONG,LAHF,ABM,3DNOWP,ITSC,RDSEED
cpu0: 256KB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: CPU supports MTRRs but not enabled by BIOS
cpu0: apic clock running at 999MHz
cpu0: mwait min=64, max=64
ioapic0 at mainbus0: apid 1 pa 0xfec00000, version 11, 24 pins
acpiprt0 at acpi0: bus 0 (PCI0)
acpicpu0 at acpi0: C1(@1 halt!)
acpibat0 at acpi0: BAT0 model "1" serial 0 type VBOX oem "innotek"
acpiac0 at acpi0: AC unit online
acpivideo0 at acpi0: GFX0
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82441FX" rev 0x02
pcib0 at pci0 dev 1 function 0 "Intel 82371SB ISA" rev 0x00
pciide0 at pci0 dev 1 function 1 "Intel 82371AB IDE" rev 0x01: DMA, channel 0
configured to compatibility, channel 1 configured to compatibility
wd0 at pciide0 channel 0 drive 0: <VBOX HARDDISK>
wd0: 128-sector PIO, LBA, 65536MB, 134217728 sectors
wd0(pciide0:0:0): using PIO mode 4, Ultra-DMA mode 2
atapiscsi0 at pciide0 channel 1 drive 0
scsibus1 at atapiscsi0: 2 targets
cd0 at scsibus1 targ 0 lun 0: <VBOX, CD-ROM, 1.0> ATAPI 5/cdrom removable
cd0(pciide0:1:0): using PIO mode 4, Ultra-DMA mode 2
vga1 at pci0 dev 2 function 0 "InnoTek VirtualBox Graphics Adapter" rev 0x00
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
em0 at pci0 dev 3 function 0 "Intel 82540EM" rev 0x02: apic 1 int 19, address
08:00:27:e6:f8:20
"InnoTek VirtualBox Guest Service" rev 0x00 at pci0 dev 4 function 0 not
configured
auich0 at pci0 dev 5 function 0 "Intel 82801AA AC97" rev 0x01: apic 1 int 21,
ICH AC97
ac97: codec id 0x83847600 (SigmaTel STAC9700)
audio0 at auich0
ohci0 at pci0 dev 6 function 0 "Apple Intrepid USB" rev 0x00: apic 1 int 22,
version 1.0
piixpm0 at pci0 dev 7 function 0 "Intel 82371AB Power" rev 0x08: SMBus disabled
ehci0 at pci0 dev 11 function 0 "Intel 82801FB USB" rev 0x00: apic 1 int 19
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 "Intel EHCI root hub" rev 2.00/1.00 addr 1
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, using wsdisplay0
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
usb1 at ohci0: USB revision 1.0
uhub1 at usb1 "Apple OHCI root hub" rev 1.00/1.00 addr 1
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on wd0a (749bc0a6c243b79c.a) swap on wd0b dump on wd0b
usbdevs:
Controller /dev/usb0:
addr 1: high speed, self powered, config 1, EHCI root hub(0x0000),
Intel(0x8086), rev 1.00
port 1 powered
port 2 powered
port 3 powered
port 4 powered
port 5 powered
port 6 powered
port 7 powered
port 8 powered
port 9 powered
port 10 powered
port 11 powered
port 12 powered
Controller /dev/usb1:
addr 1: full speed, self powered, config 1, OHCI root hub(0x0000),
Apple(0x106b), rev 1.00
port 1 powered
port 2 powered
port 3 powered
port 4 powered
port 5 powered
port 6 powered
port 7 powered
port 8 powered
port 9 powered
port 10 powered
port 11 powered
port 12 powered
pcidump:
Domain /dev/pci0:
0:0:0: Intel 82441FX
0x0000: Vendor ID: 8086 Product ID: 1237
0x0004: Command: 0000 Status: 0000
0x0008: Class: 06 Subclass: 00 Interface: 00 Revision: 02
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR empty (00000000)
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 00 Line: 00 Min Gnt: 00 Max Lat: 00
0x0000: 12378086 00000000 06000002 00000000
0x0010: 00000000 00000000 00000000 00000000
0x0020: 00000000 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 00000000
0x0040: 00000000 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:1:0: Intel 82371SB ISA
0x0000: Vendor ID: 8086 Product ID: 7000
0x0004: Command: 0007 Status: 0200
0x0008: Class: 06 Subclass: 01 Interface: 00 Revision: 00
0x000c: BIST: 00 Header Type: 80 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR empty (00000000)
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 00 Line: 00 Min Gnt: 00 Max Lat: 00
0x0000: 70008086 02000007 06010000 00800000
0x0010: 00000000 00000000 00000000 00000000
0x0020: 00000000 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 00000000
0x0040: 00000000 00000000 00000000 0003004d
0x0050: 00000000 00000000 00000000 00000000
0x0060: 090a0b0b 00000000 00000200 00000000
0x0070: 00000080 0c0c0000 00000002 00000000
0x0080: 00020000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000008 00000000 0000000f 0000ef00
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00be0000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:1:1: Intel 82371AB IDE
0x0000: Vendor ID: 8086 Product ID: 7111
0x0004: Command: 0007 Status: 0000
0x0008: Class: 01 Subclass: 01 Interface: 8a Revision: 01
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR empty (00000000)
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR io addr: 0x0000d000/0x0010
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 00 Line: 00 Min Gnt: 00 Max Lat: 00
0x0000: 71118086 00000007 01018a01 00000000
0x0010: 00000000 00000000 00000000 00000000
0x0020: 0000d001 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 00000000
0x0040: a307a307 00000000 02020005 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:2:0: InnoTek VirtualBox Graphics Adapter
0x0000: Vendor ID: 80ee Product ID: beef
0x0004: Command: 0007 Status: 0000
0x0008: Class: 03 Subclass: 00 Interface: 00 Revision: 00
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR mem prefetchable 32bit addr: 0xe0000000/0x00800000
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 0b Min Gnt: 00 Max Lat: 00
0x0000: beef80ee 00000007 03000000 00000000
0x0010: e0000008 00000000 00000000 00000000
0x0020: 00000000 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 0000010b
0x0040: 00000000 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:3:0: Intel 82540EM
0x0000: Vendor ID: 8086 Product ID: 100e
0x0004: Command: 0007 Status: 0230
0x0008: Class: 02 Subclass: 00 Interface: 00 Revision: 02
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR mem 32bit addr: 0xf0000000/0x00020000
0x0014: BAR empty (00000000)
0x0018: BAR io addr: 0x0000d010/0x0008
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 8086 Product ID: 001e
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 0a Min Gnt: ff Max Lat: 00
0x00dc: Capability 0x01: Power Management
State: D0
0x00e4: Capability 0x07: PCI-X
0x0000: 100e8086 02300007 02000002 00000000
0x0010: f0000000 00000000 0000d011 00000000
0x0020: 00000000 00000000 00000000 001e8086
0x0030: 00000000 000000dc 00000000 00ff010a
0x0040: 00000000 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 0022e401
0x00e0: 00000000 00020007 0040fff8 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:4:0: InnoTek VirtualBox Guest Service
0x0000: Vendor ID: 80ee Product ID: cafe
0x0004: Command: 0007 Status: 0000
0x0008: Class: 08 Subclass: 80 Interface: 00 Revision: 00
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR io addr: 0x0000d020/0x0020
0x0014: BAR mem 32bit addr: 0xf0400000/0x00400000
0x0018: BAR mem prefetchable 32bit addr: 0xf0800000/0x00004000
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 09 Min Gnt: 00 Max Lat: 00
0x0000: cafe80ee 00000007 08800000 00000000
0x0010: 0000d021 f0400000 f0800008 00000000
0x0020: 00000000 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 00000109
0x0040: 00000000 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:5:0: Intel 82801AA AC97
0x0000: Vendor ID: 8086 Product ID: 2415
0x0004: Command: 0007 Status: 0280
0x0008: Class: 04 Subclass: 01 Interface: 00 Revision: 01
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR io addr: 0x0000d100/0x0100
0x0014: BAR io addr: 0x0000d200/0x0040
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 8086 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 0b Min Gnt: 00 Max Lat: 00
0x0000: 24158086 02800007 04010001 00000000
0x0010: 0000d101 0000d201 00000000 00000000
0x0020: 00000000 00000000 00000000 00008086
0x0030: 00000000 00000000 00000000 0000010b
0x0040: 00000000 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:6:0: Apple Intrepid USB
0x0000: Vendor ID: 106b Product ID: 003f
0x0004: Command: 0007 Status: 0010
0x0008: Class: 0c Subclass: 03 Interface: 10 Revision: 00
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR mem 32bit addr: 0xf0804000/0x00001000
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 0b Min Gnt: 00 Max Lat: 00
0x0000: 003f106b 00100007 0c031000 00000000
0x0010: f0804000 00000000 00000000 00000000
0x0020: 00000000 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 0000010b
0x0040: 00000000 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:7:0: Intel 82371AB Power
0x0000: Vendor ID: 8086 Product ID: 7113
0x0004: Command: 0007 Status: 0280
0x0008: Class: 06 Subclass: 80 Interface: 00 Revision: 08
0x000c: BIST: 00 Header Type: 80 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR empty (00000000)
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 09 Min Gnt: 00 Max Lat: 00
0x0000: 71138086 02800007 06800008 00800000
0x0010: 00000000 00000000 00000000 00000000
0x0020: 00000000 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 00000109
0x0040: 00000001 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000000 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
0:11:0: Intel 82801FB USB
0x0000: Vendor ID: 8086 Product ID: 265c
0x0004: Command: 0007 Status: 0010
0x0008: Class: 0c Subclass: 03 Interface: 20 Revision: 00
0x000c: BIST: 00 Header Type: 00 Latency Timer: 00 Cache Line Size: 00
0x0010: BAR mem 32bit addr: 0xf0805000/0x00001000
0x0014: BAR empty (00000000)
0x0018: BAR empty (00000000)
0x001c: BAR empty (00000000)
0x0020: BAR empty (00000000)
0x0024: BAR empty (00000000)
0x0028: Cardbus CIS: 00000000
0x002c: Subsystem Vendor ID: 0000 Product ID: 0000
0x0030: Expansion ROM Base Address: 00000000
0x0038: 00000000
0x003c: Interrupt Pin: 01 Line: 0a Min Gnt: 00 Max Lat: 00
0x0000: 265c8086 00100007 0c032000 00000000
0x0010: f0805000 00000000 00000000 00000000
0x0020: 00000000 00000000 00000000 00000000
0x0030: 00000000 00000000 00000000 0000010a
0x0040: 00000000 00000000 00000000 00000000
0x0050: 00000000 00000000 00000000 00000000
0x0060: 00000020 00000000 00000000 00000000
0x0070: 00000000 00000000 00000000 00000000
0x0080: 00000000 00000000 00000000 00000000
0x0090: 00000000 00000000 00000000 00000000
0x00a0: 00000000 00000000 00000000 00000000
0x00b0: 00000000 00000000 00000000 00000000
0x00c0: 00000000 00000000 00000000 00000000
0x00d0: 00000000 00000000 00000000 00000000
0x00e0: 00000000 00000000 00000000 00000000
0x00f0: 00000000 00000000 00000000 00000000
acpidump:
begin-base64 644 openbsd.APIC.3
QVBJQ1QAAAACY1ZCT1ggIFZCT1hBUElDAQAAAEFTTCBhAAAAAADg/gEAAAACCgAAAgAAAAAAAgoA
CQkAAAANAAAIAAABAAAAAQwBAAAAwP4AAAAA
====
begin-base64 644 openbsd.DSDT.2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====
