Re: CVS version hangs the computer

From: Ricardo Galli (
Date: 2002-08-28 16:08:05 UTC

On Wednesday 28 August 2002 17:07, Jouni Malinen shaped the electrons to say:
> On Wed, Aug 28, 2002 at 04:42:13PM +0200, Ricardo Galli wrote:
> > Just tested, and it still kills the machine (just with few iwconfig
> > executions), although I don't know if you mean you fixed both, or just
> > the "unrelated" second one.
> It was really only one issue and yes, it should have been fixed. At least
> this fix removed the more or less instant hang that crashed my SMP test
> setup when executing 'iwconfig wlan0 frag 2000' while ping flood was
> running on the background. Well, apparently I have to do some more
> testing.. With what command did you see the crash? Do you get any kernel

Just plain iwconfig (with no arguments, as root at least, running it several times) or wavemon, which hangs the machine in few seconds.

My test is a ping from a machine in the _ethernet_ (100 mbps) side [*] to another machine in the wireless, using 104 WEP encryption, kernel 2.4.19 and bridging enabled.

[*] It takes a much longer time if I ping-flood _from_ a client the wireless side to a machine in the wireless or ethernet segment.

> oops message etc.? I used NMI watchdog to detect this deadlock and it
> might well be hard hang that cannot even show oops message without NMI
> watchdog..

Couldn't enable nmi watchdog in the notebook (it's a old p133 Digital HiNote), even enabling local APIC and IO-APIC.

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