SMP Frequent Lockups

John Leach john at
Sat Aug 2 08:55:21 EDT 2003

I've had the same with my Netgear PCI card with kernel 2.4.20 (I tried
the provided kernel RPMs (rebuilt for SMP of course) and tried with the
latest (030722) hostap from cvs patched in to the same kernel.

The machine works fine (no lockups in weeks of use) with a UP kernel,
but in SMP it will hard lock requiring a powercycle within a few

 localhost kernel: hostap_pci: Registered netdevice wlan0
 localhost kernel: prism2_hw_init() 
 localhost kernel: prism2_hw_init: initialized in 17954 iterations
 localhost kernel: wlan0: NIC: id=0x8013 v1.0.0
 localhost kernel: wlan0: PRI: id=0x15 v1.0.7
 localhost kernel: wlan0: STA: id=0x1f v1.3.6
 localhost kernel: wlan0: defaulting to host-based encryption as a workaround for firmware bug in Host AP mode WEP
 localhost kernel: wlan0: defaulting to bogus WDS frame as a workaround for firmware bug in Host AP mode WDS
 localhost kernel: wlan0: Intersil Prism2.5 PCI: mem=0xe4000000, irq=16
 localhost kernel: hostap_crypt: registered algorithm 'WEP'

I've now moved to a uniprocessor machine, but if you need me to I could
swap cards back and do some tests (if nobody else can).

Thanks for the great work so far.


On Fri, 2003-08-01 at 18:39, Michael Vallaly wrote:
> Hello,
> I am having issues with my WPC11 Linksys PCI card and a 2.4.21 SMP kernel. I recently upgraded the machine with another processor and recompiled the kernel to support SMP. Previously ive had only 1 or 2 lockups (non SMP kernel) using Hostap 0.0.3 under heavy traffic (FTP for instance) over a 3 month span. Now with the SMP kernel I have lockups with even light usage of the wireless AP (ssh or webbrowsing). These are hard lockups that require cycling the power via unplugging. I can verify that the lockups only happen with some sort of traffic on the wireless card, as I can keep the hostap module loaded with the interface down, and not crash. Anyone have a solution? 
> Ive tried every patch I can get my hands on, as well as the Hostap CVS code.
> I will have quite a bit of free time from now until Aug 25th or so, and I am willing to test any patches / ideas thrown my way ;)  
> -Mike 

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