On Wed, Feb 2, 2011 at 12:25 PM, Ben Greear <gree...@candelatech.com> wrote: > On 02/01/2011 09:57 PM, Mohammed Shafi wrote: >> >> On Wed, Feb 2, 2011 at 11:18 AM, Nikolay Martynov<mar.ko...@gmail.com> >> wrote: >>> >>> Hi. >>> >>> Have ath9k AP and intel 5300 client. AP has latest openwrt, intel5300 >>> has latest linux driver. Network operates in 801.11g mode. When client >>> uploads to the AP for a long time I get these errors in logs on AP: >>> >>> ath: txq: 80c3d7fc axq_qnum: 2, mac80211_qnum: 2 axq_link: a0d575f8 >>> pending frames: 7 axq_acq empty: 0 stopped: 0 axq_depth: 0 Attempting >>> to restart tx logic. > >>> ath: txq: 80c3d7fc axq_qnum: 2, mac80211_qnum: 2 axq_link: a0d58f5c >>> pending frames: 124 axq_acq empty: 0 stopped: 1 axq_depth: 0 >>> Attempting to restart tx logic. >>> >>> Transmission seems to die after this. >>> Could you please tell me what these messages mean and is it possible >>> to fix this issue on ath9k side? >> >> Looks like a tx hang and this commit will provide us more details >> >> commit 60f2d1d506195803fa6e1dcf3972637b740fdd60 >> Author: Ben Greear<gree...@candelatech.com> >> Date: Sun Jan 9 23:11:52 2011 -0800 >> >> ath9k: Restart xmit logic in xmit watchdog. >> >> The system can get into a state where the xmit queue >> is stopped, but there are no packets pending, so >> the queue will not be restarted. >> >> Add logic to the xmit watchdog to attempt to restart >> the xmit logic if this situation is detected. >> >> Example 'dmesg' output: >> >> ath: txq: f4e723e0 axq_qnum: 2, mac80211_qnum: 2 axq_link: >> f4e996c8 pending frames: 1 axq_acq empty: 1 stopped: 0 axq_depth: 0 >> Attempting to restart tx logic. >> >> sudo modprobe ath9k debug=0x481(FATAL | XMIT | RESET) will provide us >> some useful debug messages > > Looks like my attempt to restart is not working, for whatever reason. > There are several ways it could get stuck...my hack worked around > some of them, but obviously not all of them.
Oh Ok. I will look into that code part more deeply. > > You might also look at the debugfs files while the system is in > the stuck state: > > cat /debug/ieee80211/wiphy0/ath9k/stations > cat /debug/ieee80211/wiphy0/ath9k/xmit > > Those show info that *might* help debug the problem... Thanks Ben. > > Thanks, > Ben > > > -- > Ben Greear <gree...@candelatech.com> > Candela Technologies Inc http://www.candelatech.com > _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
