2.3.99-pre3 and network hang

[andy barlak]

Replying to my own posting...
additional diagnostics  and testing other kernels and other motherboards
pointed to a hardware configuration problem.
comparing systems shows
same motherboard, same tulip card, changed to running the same
kernel-2.2.14, same tulip.c- "tulip.c:v0.91g-ppc 7/16/99".

Comparing bios settings showed one difference, under pnp/pci
configuration:  "CPU to PCI Write Buffer"  was disabled on the system
with the network hang problem.  Changing the bios feature to "enabled"
caused the network hang to be much more difficult to induce.

An excellent way to cause the problem was to run "xv some.jpg" on the 
remote and display on the local system.  Before the bios change,
a 120k jpg would hang the network at least three times before it
completely displayed once.  With the bios change it displays completely,
no hangs, repeatedly.

I have induced a hang or two with incessant redisplaying of the image,
however, so there is still a problem. 




On Fri, 24 Mar 2000, andy barlak wrote:

> 
> sure way to lock tulip card found.
> Cards used are "acer ALN-310U",  using Digital 21140-AF, 2 years old.
> using 100mhz, 
> Hub: netgear DS104 100/10.
> 
> System that never locks up is 
> Linux tosko 2.2.14 #1 Tue Jan 4 18:19:14 PST 2000 i586 unknown,
> on a FIC-503+, with a AMD-K6-350.
> 
> System that locks up is
> Linux boska 2.3.99-pre3 #15 Fri Mar 24 06:42:33 PST 2000 i586 unknown
> on a FIC-503+, with a AMD-K6-400.
> 
> Can make the ethercard network lockup occur by starting an X application
> on the 2.2.14 system and displaying it on the 2.3.99 system.
> In this case the "mtr" utility (my traceroute) is the application that
> takes the network down in a few seconds.  mtr some.remote.host  brings
> up a window, displays info about some host out there on the dialup
> link, and locks the network in from 2 to 60 seconds.
> 
> 
> dmesg shows the following:
> 
> NETDEV WATCHDOG: eth0: transmit timed out
> eth0: 21140 transmit timed out, status fc660000, SIA ffffff20 ffffffff
> 1c09fdc0 fffffec8, resetting...
> eth0: transmit timed out, switching to 10baseT media.
> NETDEV WATCHDOG: eth0: transmit timed out
> eth0: 21140 transmit timed out, status fc660000, SIA ffffff20 ffffffff
> 1c09fdc0 fffffec8, resetting...
> eth0: transmit timed out, switching to 100baseTx-FD media.
> 
> large ftp transfers (70meg) work with no hangs either direction.
> 
> What information would be more useful?
> 
> 
> lsmod:
> tulip                  35740   1 
> BusLogic               36736   0  (unused)
> scsi_mod               90408   1  [BusLogic]
> 
> 
> 
> 
> CONFIG_NET_ETHERNET=y
> CONFIG_NET_PCI=y
> CONFIG_DE4X5=m
> CONFIG_TULIP=m
> CONFIG_NE2K_PCI=m
> CONFIG_VIA_RHINE=m
> 
> 
> -------------------------------------------------------------------------------
>  Andy Barlak               
> 
> 
> 
> 
> 
> 

-------------------------------------------------------------------------------
 Andy Barlak               



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