Re: large ethernet transfers killing ARMLinux

[Russell King - ARM Linux Admin]

Nicholas Clark writes:
> I think I've now had four reset button job lockups from ARMLinux where I've
> throwing large files over Ethernet. The most recent today was ftping a 83M
> file in from Solaris box on the local Ethernet - after screens of # marks
> everything locked up with 72M downloaded. After previous crashes I had a look
> at /var/log/Messages and there's nothing at all there from the time of the
> crash (no clues :-() I'm using an I cubed EtherH card in the network card
> slot of an issue 3 motherboard 610 (October 1996) with a revision K
> StrongARM, 38M in all and one 8.4G IBM HD (if any of that helps) with Kernel
> 2.0.35.

This is very interesting, since I just cannot reproduce any here.  The
following FTP was performed between a NetWinder (disk build #13, kernel
2.0.35) and my RiscPC (2.0.36) on a 10bT connection via a Allied Telesyn
CentreCOM hub.  I've repeated this several times in succession, and these
are the FTP messages I got each time.

62126480 bytes received in 109 secs (5.5e+02 Kbytes/sec)
62124288 bytes received in 108 secs (5.6e+02 Kbytes/sec)
62125916 bytes received in 110 secs (5.5e+02 Kbytes/sec)
62123240 bytes received in 109 secs (5.6e+02 Kbytes/sec)

The interface stats are:

eth0      Link encap:10Mbps Ethernet  HWaddr 00:C0:32:00:7C:F9
          inet addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:181863 errors:0 dropped:0 overruns:0
          TX packets:52588 errors:0 dropped:0 overruns:0
          Interrupt:11 Base address:0xae00

I have also used in the past ttcp between to ARM Linux boxes, and have not
noticed any crashes.

However, having said that, the EBSA-110 crashed while running 2.2.1 this
week, but I haven't been able to reproduce this problem.  I believe that
this particular problem was caused by the ethernet driver dying.

Hwa - do you have the SysRQ stuff enabled in your kernel?  Does it still
work after the crash?
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