[rt2x00-users] rt2x00queue_write_tx_frame: Error - Arrived at non-free entry in the non-full queue 2

[Hasan Rashid]

It did it again, I was unable to ping any of the clients when this
happened. Disregard the time stamps the time on the host machine is
inaccurate.

The machine uses a  Intel(R) Core(TM) Duo CPU      U2500  @ 1.20GHz with
2 GB RAM.

Kernel:
Ubuntu 10.10 \n \l
Linux 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686
GNU/Linux

#iw wlan0 station dump | grep wlan0 | wc -l
50

wlan0     IEEE 802.11bgn  Mode:Master  Frequency:2.462 GHz  Tx-Power=20
dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

mon.wlan0  IEEE 802.11bgn  Mode:Monitor  Tx-Power=20 dBm
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off

---------------- LOG -------------
[   16.674561] NOHZ: local_softirq_pending 08
[   16.770414] NOHZ: local_softirq_pending 08
[   17.141905] NOHZ: local_softirq_pending 08
[   17.318366] NOHZ: local_softirq_pending 08
[   17.321148] NOHZ: local_softirq_pending 08
[   17.431325] NOHZ: local_softirq_pending 08
[   17.575736] NOHZ: local_softirq_pending 08
[   17.891912] NOHZ: local_softirq_pending 08
[   20.501097] EXT4-fs (sda1): re-mounted. Opts:
errors=remount-ro,commit=0
[   25.496288] EXT4-fs (sda1): re-mounted. Opts:
errors=remount-ro,commit=0
[   26.872021] eth0: no IPv6 routers present
[   27.184016] wlan0: no IPv6 routers present
[ 1371.599531] phy0 -> rt2x00queue_write_tx_frame: Error - Arrived at
non-free entry in the non-full queue 2.
[ 1371.599537] Please file bug report to http://rt2x00.serialmonkey.com.


cat /sys/kernel/debug/ieee80211/phy0/rt2800pci/queue/queue
qid     flags           count   limit   length  index   dma done
done
14      0x00000001      538980  128     0       100     100
100
0       0x00000001      5794    64      0       34      0
34
1       0x00000001      0       64      0       0       0
0
2       0x00000001      374050  64      0       34      0
34
3       0x00000001      0       64      0       0       0
0
16      0x00000001      0       8       0       0       0
0

------------ LOG END ----------------


Hasan R.

-----Original Message-----
From: Helmut Schaa [mailto:helmut.schaa at googlemail.com] 
Sent: Friday, April 01, 2011 2:59 AM
To: Hasan Rashid
Cc: users at rt2x00.serialmonkey.com
Subject: Re: [rt2x00-users] rt2x00queue_write_tx_frame: Error - Arrived
at non-free entry in the non-full queue 2

Hi,

Am Freitag, 1. April 2011 schrieb Hasan Rashid:
> I am running rt2x00 driver /sys/module/rt2x*/version= 2.3.0 with a 
> rt2860 PCIe Gigabyte GN-WS31N. I downloaded the driver from 
> compat-wireless on 3/23/2011. I have setup hostapd v 0.6.10 configured

> with nl80211 driver. I am using ht_capab=[HT40-][SHORT-GI-40]
>  
> I am using iperf to test maximum link capacity, and I've noticed that 
> whenever the link is stressed with about 2-3 clients I get the
> following:
>  
>  
> [34174.490298] phy0 -> rt2x00queue_write_tx_frame: Error - Arrived at 
> non-free entry in the non-full queue 2.
> [34174.490305] Please file bug report to
http://rt2x00.serialmonkey.com.

I haven't seen this error triggering for quite some time now. Which
kernel version are you using?

Could you please compile the driver with CONFIG_RT2X00_LIB_DEBUGFS=y and
attach the output of
	cat /sys/kernel/debug/ieee80211/phy0/rt2800pci/queue/queue
when the driver runs into this error.

Also, is this an SMP machine?

Thanks,
Helmut
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