On Tue, 2012-01-31 at 17:08 +0100, Tim Sander wrote:

Hi

quoted

I'm having trouble running wifi in combination with a rt enabled kernel
3.0.9-rt26 on an imx51 arm platform. The distro is openwrt-trunk.

The device has 2 usb wifi interfaces (AR9271 chipset; driver: based on
compat-wireless-testing 2011-12-01). I am running an iperf load on both
interfaces, one interface is in AP mode, the other in STA mode.

When I configure the kernel without RT preemption, the device runs
stable for >10 hours.

With RT preemption enabled, after a couple of minutes some interface
will stop transmitting data. Sometimes ifconfig wlan[0,1] down will
hang, sometimes ifconfig wlan[0,1] down will work, but then ping will

Just my 5 cents: I am working on the imx 35 platform and i am also having 
problems with the network setup. I have sent a bugsplat to this list which 
occurs in the network setup with 3.2-rt. I suspect that these two errors are 
related. Steven Rosted wanted to look after it, but it seems he hasn't until 
now.

Yeah, I've been hunting down other nasty bugs in the mean time. I could
start looking at this. I suspect it may be due to another try_lock()
thingy.

-- Steve