Re: Kernel freeze under heavy (transmit) load

From: David Levitan (david_at_dlevitan.com)
Date: 2002-06-13 15:52:09 UTC


I see the same thing on my system - under heavy load it will crash sometimes. Actually, this was a big problem before maybe april, and then went away. Now it's back. I'm running a clean 2.4.18 kernel with freeswan (ipsec), i2c, sensors, and xfs. The wireless driver is using pcmcia-cs. The kernel does have SMP enabled. -David

Devaney, Matthew wrote: 

> There was a post on here a few days back that suggested using a
> vanilla-kernel (as opposed to the redhat / Mandrake mod'd ones). Given I had
> a bit of free time yesterday I tried that with a 2.4.18 downloaded from
> kernel.org, and so far I've been able to copy several large files at some
> 50+Kbytes a sec across the wlan and it hasn't crashed anything yet.
> 
> In both cases SMP was enabled, as was IO-APIC.
> 
> Colin - just out of interest, is your kernel a mod'd one? Or are you seeing
> the same behaviour with a clean kernel?
> 
> Matt
> 
> 
>

>>-----Original Message-----
>>From: Colin Palmer [mailto:colin_at_osoal.org.nz]
>>Sent: 12 June 2002 22:22
>>To: 'hostap_at_lists.ssh.com'
>>Subject: RE: Kernel freeze under heavy (transmit) load
>>
>>
>>On Tue, 11 Jun 2002, Devaney, Matthew wrote:
>>
>>
>>>Hi,
>>> I've been getting the same problem with the 2002-05-19 driver .. In
>>>previous versions the wlan card would just suddenly stop
>>
>>sending/recieving
>>
>>>packets under load and I had to reset the driver by hand to
>>
>>get it working
>>
>>>again - now it works under load most of the time but will
>>
>>occasionally
>>
>>>freeze the system. (At least I think it's the wlan.. having
>>
>>tried narrowing
>>
>>>it down that's what it looks like so-far)
>>
>>This may or may not be the same problem, but I can make a Prism2.5 PCI
>>card hang the system consistently if the kernel (2.4.18) is
>>compiled with
>>SMP support. Wireless clients can connect fine, and ping ithe AP fine,
>>but as soon as I start a large file transfer the host system freezes.
>>Recompiling without SMP or IO-APIC enabled seems to fix it.
>>
>>--
>>Colin Palmer -- colin_at_osoal.org.nz -- http://raccoon.osoal.org.nz/
>>Systems Engineer -- [One Short Of A Llama] http://web.osoal.org.nz/
>>
> 
> 
> 
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