cvs commit: src/sys/dev/em if_em.c

[Stefan Bethke]

Am 22.08.2006 um 21:02 schrieb Patrick M. Hausen:

> em interface, FTPing a large file while putting disk and cpu/memory
> load on the box -> occasional but easily reproducable complete hangs
> of network communication (ssh, ping - no reaction). Every time a
>
> em0: Missing Tx completion interrupt!
>
> is logged.

I have no idea whether the effect I'm seeing is related at all, but  
the description fits.  If I load the CPU (make world -j4 or gzip -9 </ 
dev/random >/dev/null), traffic over re0 stops and I get

Aug 22 09:30:20 diesel kernel: re0: watchdog timeout
Aug 22 09:30:20 diesel kernel: re0: link state changed to DOWN
Aug 22 09:30:23 diesel kernel: re0: link state changed to UP
Aug 22 09:30:35 diesel kernel: re0: watchdog timeout
Aug 22 09:30:35 diesel kernel: re0: link state changed to DOWN
Aug 22 09:30:39 diesel kernel: re0: link state changed to UP

until I stop the CPU hog; then, it appears to be working fine again.   
I've got two rl's in there as well, and they appear to be completely  
unaffected.

FreeBSD diesel 6.1-STABLE FreeBSD 6.1-STABLE #9: Fri Aug 18 00:32:12  
CEST 2006     root at diesel:/usr/obj/usr/src/sys/DIESEL  i386

rl0: <RealTek 8139 10/100BaseTX> port 0xe800-0xe8ff mem  
0xdfdff000-0xdfdff0ff irq 16 at device 0.0 on pci1
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl0: Ethernet address: 00:a1:b0:f0:aa:a2
rl1: <RealTek 8139 10/100BaseTX> port 0xec00-0xecff mem  
0xdfdfe000-0xdfdfe0ff irq 17 at device 5.0 on pci1
miibus1: <MII bus> on rl1
rlphy1: <RealTek internal media interface> on miibus1
rlphy1:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
rl1: Ethernet address: 00:a1:b0:f0:a8:57
re0: <RealTek 8169SB/8110SB Single-chip Gigabit Ethernet> port  
0xea00-0xeaff mem 0xdfdfd000-0xdfdfd0ff irq 18 at device 10.0 on pci1
miibus2: <MII bus> on re0
rgephy0: <RTL8169S/8110S media interface> on miibus2
rgephy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX,  
1000baseTX-FDX, auto
re0: Ethernet address: 00:01:29:2c:44:e9
re0: [FAST]

rl0 at pci1:0:0:   class=0x020000 card=0x813910ec chip=0x813910ec  
rev=0x10 hdr=0x00
     vendor   = 'Realtek Semiconductor'
     device   = 'RT8139 (A/B/C/810x/813x/C+) Fast Ethernet Adapter'
     class    = network
     subclass = ethernet
rl1 at pci1:5:0:   class=0x020000 card=0x813910ec chip=0x813910ec  
rev=0x10 hdr=0x00
     vendor   = 'Realtek Semiconductor'
     device   = 'RT8139 (A/B/C/810x/813x/C+) Fast Ethernet Adapter'
     class    = network
     subclass = ethernet
re0 at pci1:10:0:  class=0x020000 card=0x100a15bd chip=0x816910ec  
rev=0x10 hdr=0x00
     vendor   = 'Realtek Semiconductor'
     device   = 'RTL8169 Gigabit Ethernet Adapter'
     class    = network
     subclass = ethernet


-- 
Stefan Bethke <stb at lassitu.de>   Fon +49 170 346 0140