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	if i leave my laptop with ath* interface (ThinkPad) for a whole night,
	tcp session from the laptop to other machine is disconnected.  i
	wondered why and my conclusion is that:
	- ath* interface goes into "buffer full" state and due to this
	  tcp session times out
	- it can only be recovered by "ifconfig ath0 down/up"
	does anyone else experience this symptom?

	my kernel is like below (did "cvs update" right before the build).
	dmesg is attached.

itojun


NetBSD starfruit.itojun.org 2.99.15 NetBSD 2.99.15 (STARFRUIT) #47: Thu Feb 10 12:10:00 JST 2005  itojun@starfruit.itojun.org:/home/itojun/NetBSD/src/sys/arch/i386/compile/STARFRUIT i386


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NetBSD 2.99.15 (STARFRUIT) #47: Thu Feb 10 12:10:00 JST 2005
	itojun@starfruit.itojun.org:/home/itojun/NetBSD/src/sys/arch/i386/compile/STARFRUIT
total memory = 1022 MB
avail memory = 993 MB
BIOS32 rev. 0 found at 0xfd750
mainbus0 (root)
cpu0 at mainbus0: (uniprocessor)
cpu0: Intel Pentium M (Banias) (686-class), 1398.88 MHz, id 0x695
cpu0: features a7e9f9bf<FPU,VME,DE,PSE,TSC,MSR,MCE,CX8,SEP,MTRR>
cpu0: features a7e9f9bf<PGE,MCA,CMOV,PAT,CFLUSH,DS,ACPI,MMX>
cpu0: features a7e9f9bf<FXSR,SSE,SSE2,TM,SBF>
cpu0: features2 180<EST,TM2>
cpu0: "Intel(R) Pentium(R) M processor 1400MHz"
cpu0: using thermal monitor 2
cpu0: Enhanced SpeedStep running at 1400 MHz (1484 mV)
cpu0: Enhanced SpeedStep frequencies available (MHz): 1400 1200 1000 800 600
pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok
pchb0 at pci0 dev 0 function 0
pchb0: Intel 82855PM MCH Host Controller (rev. 0x03)
agp0 at pchb0: aperture at 0xd0000000, size 0x10000000
ppb0 at pci0 dev 1 function 0: Intel 82855PM Host-AGP Bridge (rev. 0x03)
pci1 at ppb0 bus 1
pci1: i/o space, memory space enabled
vga1 at pci1 dev 0 function 0: ATI Technologies Radeon Mobility M6 LY (AGP) (rev. 0x00)
wsdisplay0 at vga1 kbdmux 1: console (80x25, vt100 emulation)
wsmux1: connecting to wsdisplay0
uhci0 at pci0 dev 29 function 0: Intel 82801DB USB UHCI Controller (rev. 0x01)
uhci0: interrupting at 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
uhci1 at pci0 dev 29 function 1: Intel 82801DB USB UHCI Controller (rev. 0x01)
uhci1: interrupting at irq 11
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
uhci2 at pci0 dev 29 function 2: Intel 82801DB USB UHCI Controller (rev. 0x01)
uhci2: interrupting at irq 11
usb2 at uhci2: USB revision 1.0
uhub2 at usb2
uhub2: Intel UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
uhub2: 2 ports with 2 removable, self powered
Intel 82801DB USB EHCI Controller (USB serial bus, interface 0x20, revision 0x01) at pci0 dev 29 function 7 not configured
ppb1 at pci0 dev 30 function 0: Intel 82801BAM Hub-PCI Bridge (rev. 0x81)
pci2 at ppb1 bus 2
pci2: i/o space, memory space enabled
cbb0 at pci2 dev 0 function 0: Ricoh 5C476 PCI-CardBus bridge (rev. 0xaa)
cbb1 at pci2 dev 0 function 1: Ricoh 5C476 PCI-CardBus bridge (rev. 0xaa)
Ricoh 5C552 PCI-CardBus bridge/Firewire (Firewire serial bus, interface 0x10, revision 0x02) at pci2 dev 0 function 2 not configured
wm0 at pci2 dev 1 function 0: Intel i82540EP 1000BASE-T Ethernet, rev. 3
wm0: interrupting at irq 11
wm0: 32-bit 33MHz PCI bus
wm0: 64 word (6 address bits) MicroWire EEPROM
wm0: Ethernet address 00:09:6b:fa:6f:49
makphy0 at wm0 phy 1: Marvell 88E1011 Gigabit PHY, rev. 4
makphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseT, 1000baseT-FDX, auto
ath0 at pci2 dev 2 function 0
ath0: interrupting at irq 11
ath0: mac 5.6 phy 4.1 5ghz radio 1.7 2ghz radio 2.3
ath0: 11a rates: 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
ath0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
ath0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
cbb0: interrupting at irq 11
cardslot0 at cbb0 slot 0 flags 0
cardbus0 at cardslot0: bus 3 device 0
pcmcia0 at cardslot0
cbb1: interrupting at irq 11
cardslot1 at cbb1 slot 1 flags 0
cardbus1 at cardslot1: bus 6 device 0
pcmcia1 at cardslot1
pcib0 at pci0 dev 31 function 0
pcib0: Intel 82801DB ISA Bridge (rev. 0x01)
piixide0 at pci0 dev 31 function 1
piixide0: Intel 82801DBM IDE Controller (ICH4-M) (rev. 0x01)
piixide0: bus-master DMA support present
piixide0: primary channel wired to compatibility mode
piixide0: primary channel interrupting at irq 14
atabus0 at piixide0 channel 0
piixide0: secondary channel wired to compatibility mode
piixide0: secondary channel interrupting at irq 15
atabus1 at piixide0 channel 1
Intel 82801DB SMBus Controller (SMBus serial bus, revision 0x01) at pci0 dev 31 function 3 not configured
auich0 at pci0 dev 31 function 5: i82801DB/DBM (ICH4/ICH4M) AC-97 Audio
auich0: interrupting at irq 11
auich0: ac97: Analog Devices AD1981B codec; headphone, 20 bit DAC, no 3D stereo
auich0: ac97: ext id 601<AC97_22,AMAP,VRA>
Intel 82801DB AC97 Modem Controller (modem communications, revision 0x01) at pci0 dev 31 function 6 not configured
isa0 at pcib0
lpt2 at isa0 port 0x3bc-0x3bf irq : polled
com0 at isa0 port 0x3f8-0x3ff irq 4: ns16550a, working fifo
com1 at isa0 port 0x2f8-0x2ff irq 3: ns16550a, working fifo
pckbc0 at isa0 port 0x60-0x64
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
pckbc0: using irq 12 for aux slot
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: PC speaker
sysbeep0 at pcppi0
isapnp0 at isa0 port 0x279: ISA Plug 'n Play device support
npx0 at isa0 port 0xf0-0xff: using exception 16
fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2
isapnp0: no ISA Plug 'n Play devices found
apm0 at mainbus0: Power Management spec V1.2
auich0: measured ac97 link rate at 48004 Hz, will use 48000 Hz
audio0 at auich0: full duplex, mmap, independent
Kernelized RAIDframe activated
IPsec: Initialized Security Association Processing.
wd0 at atabus0 drive 0: <IC25N040ATCS04-0>
wd0: drive supports 16-sector PIO transfers, LBA addressing
wd0: 38154 MB, 77520 cyl, 16 head, 63 sec, 512 bytes/sect x 78140160 sectors
wd0: 32-bit data port
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 5 (Ultra/100)
wd0(piixide0:0:0): using PIO mode 4, Ultra-DMA mode 5 (Ultra/100) (using DMA)
cbb1: wait took 156.637036s
cbb1: power on failed?
pcmcia1: card appears to have bogus CIS
boot device: wd0
root on wd0a dumps on wd0b
root file system type: ffs
wsdisplay0: screen 1 added (80x25, vt100 emulation)
wsdisplay0: screen 2 added (80x25, vt100 emulation)
wsdisplay0: screen 3 added (80x25, vt100 emulation)
wsdisplay0: screen 4 added (80x25, vt100 emulation)
cbb1: wait took 0.031781s
com3 at pcmcia1 function 0: <HONDA ELECTRON CO.,LTD, AH-H401C>
com3: ns16550a, working fifo
com3 detached
atabus0: resuming...
atabus1: resuming...
atabus0: resuming...
atabus1: resuming...
atabus0: resuming...
atabus1: resuming...
atabus0: resuming...
atabus1: resuming...
ath0: device timeout
ath0: device timeout
ath0: device timeout
ath0: device timeout

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