linux-kernel - Re: iwl3945 in 2.6.24-rc1 dies under load

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Date:	Wed, 31 Oct 2007 12:05:11 +0100
From:	Pavel Machek <pavel@....cz>
To:	Zhu Yi <yi.zhu@...el.com>
Cc:	linux-wireless@...r.kernel.org,
	kernel list <linux-kernel@...r.kernel.org>,
	ipw3945-devel@...ts.sourceforge.net
Subject: Re: iwl3945 in 2.6.24-rc1 dies under load

On Wed 2007-10-31 08:54:58, Zhu Yi wrote:
> 
> On Wed, 2007-10-31 at 01:52 +0100, Pavel Machek wrote:
> > tcpspray -n 1 -b 10000000 10.0.0.2
> > 
> > Oct 31 01:42:56 amd kernel: iwl3945: Microcode SW error detected.
> > Restarting 0x82000008.
> > Oct 31 01:42:56 amd kernel: iwl3945: Error Reply type 0x00000005 cmd
> > REPLY_TX (0x1C) seq 0x02C7 ser 0x0000004B
> > Oct 31 01:42:58 amd kernel: iwl3945: Can't stop Rx DMA.
> 
> Please attach the dmesg with module param debug=0x43fff (make sure
> CONFIG_IWLWIFI_DEBUG is selected). This will dump the firmware event log
> for debug.

I addded debug=0x43fff to command line, and it produces _incredible_
ammount of syslog noise... and the error goes away, probably due to
changed timing :-(. I can now reliably transfer huge files:

root@amd:/data/l/linux/drivers/net/wireless/iwlwifi# tcpspray -n 1 -b
10000000 hobit

Transmitted 10000000 bytes in 12.388257 seconds (788.297 kbytes/s)
root@amd:/data/l/linux/drivers/net/wireless/iwlwifi# tcpspray -n 1 -b
100000000 hobit

Transmitted 100000000 bytes in 123.807061 seconds (788.778 kbytes/s)
root@amd:/data/l/linux/drivers/net/wireless/iwlwifi# tcpspray -n 1 -b
1000000000 hobit

Transmitted 1000000000 bytes in 1265.784625 seconds (771.508 kbytes/s)
root@amd:/data/l/linux/drivers/net/wireless/iwlwifi#

rmmod/insmod w/o debug=, and ...huh... problem is _still_ away?!


								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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