Re: Still 4965 issues with wireless-testing

Hi Tomas,

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so besides the point that the Ubuntu 8.10 kernel has a broken  
driver
for
the Intel 4965 cards which will crash my X61 after less than one
minute
uptime when it connects to my access point, I have my dmesg  
full with
warnings from the latest wireless-testing kernel.

I know that we have discussed this before and Johannes' patch  
at least
turns it into warnings instead of killing my system  
completely, but I
am
still surprised why this hasn't been fixed.

so this becomes more and more annoying. I get this WARN_ON now  
multiple
times pre minute. Only the first few minutes after loading the  
firmware
everything is okay and then it keeps filling my dmesg. And on  
top of
that, I
now see these:

__ratelimit: 1189 callbacks suppressed
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
__ratelimit: 57695 callbacks suppressed
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers
__ratelimit: 3345 callbacks suppressed
iwlagn: Can not allocate SKB buffers
iwlagn: Can not allocate SKB buffers

What is going on here? This is a normal setup and nothing  
fancy. Access
point is N-Capable from D-Link btw.

I have D-Link too I don't see this. What kernel version is this?  
Is
this your ubuntu version or wireless-testing?
Any more data you can provide (.config. slabinfo)

this is from wireless-testing. The Ubuntu 2.6.27 kernel is totally
broken.
It will crash the kernel since we are missing the patch to turn  
this into
a
warning :)

Attached is my config. The slabinfo will follow once the SKB  
errors come
up
again. It normally takes a few hours before they show. Just  
resumed that
machine.

I've downloaded whole moblin last night over 2.6.27.4, it's a bit  
slow
because the missing calibrations but it didn't crashed.

I will test your config, your machine is T61  am I right?

I have a X61 and running the 64-bit version of kernel and userspace.

I found in sky2 driver comment

* The buffer returned from netdev_alloc_skb is
* aligned except if slab debugging is enabled

Since you have slub debug enabled, can you run this debug patch on
your system (might be withe space broken, I've  just pasted in)

I applied your patch and ran the latest wireless-testing for over 24  
hours now. The iwl_tx_cmd_complete issues shows up on a regular basis  
and the allocate SKB buffers, too. However it didn't trigger the extra  
WARN_ON you added.

Regards

Marcel