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Ticket #1576 (new defect)

Opened 14 years ago

Last modified 14 years ago

Unspecified Panic - High load/throughput

Reported by: Don Bowman (don@sandvine.com) Assigned to:
Priority: major Milestone:
Component: madwifi: driver Version: trunk
Keywords: panic crash Cc: jsnyder@sandvine.com
Patch is attached: 0 Pending:

Description

Stack trace (hand-copied) is below.

If i create a 'station' interface and connect it to a wireless AP and then stream, no problem is observed. If i create an 'ap' interface, and connect my laptop to that, and stream UDP-video to the laptop from the ath interface, it panics after ~20s.

System is 2.6.20.3-ubuntu1, SMP (core 2 duo). It is an AOPEN minipc 945 VDR.

I run:

# vlc --vlm-conf /vlm --rtsp-host 0.0.0.0 -I telnet --mtu 1200 --sout-vorbis-cbr and, the '/vlm' file is new 01 vod enabled setup 01 input /nemo2.avi setup 01 mux ts

Does anybody have any suggestions? This is a real show stopper for me. It happens reliably at the same spot in this video each time.

iwconfig ath0 mode Master
iwconfig ath0 txpower auto
iwconfig ath0 rate auto
iwconfig ath0 frag 512

are the config i have

:wlan:ieee80211_encap+0x1149/0x12f0
:ath_pci:ath_ffstageq_flush+0x23/0x190
:ath_pci:ath_hardstart+0xec0/0x11e0
lock_timer_base+0x29/0x60
task_rq_lock
__wake_up_common
__qdisc_run
dev_queue_xmit
:wlan:ieee80211_hardstart
dev_queue_xmit
ip_output
ip_push_pending_frames
ip_append_data
udp_push_pending_frames
udp_sendmsg
sock_sendmsg
autoremove_wake_function
__switch_to
thread_return
sys_sendto
hrtimer_cancel
do_nanosleep
hrtimer_nanosleep
system_call

Change History

10/02/07 03:40:52 changed by mentor

  • priority changed from critical to major.

Would you provide the full text of the panic, or at least the first line, saying OOPS or BUG?

10/02/07 21:45:06 changed by jsnyder@sandvine.com

This is reliably reproducible on 2.6.20-16 and all the other kernels I have tested... buttt... with the wiconfig athX frag 512 without the frag 512, it appears to work...

The box does not have a serial port so I can't get a full oops - 60 lines arent enough to fin on the screen...

10/04/07 19:43:35 changed by jsnyder@sandvine.com

this also happens with darwin streaming server...

10/06/07 02:19:14 changed by mentor

  • summary changed from Panic when output streaming video via vlc to Unspecified Panic - High load/throughput.

DevDocs/KernelOops has documentation on using netconsole - as well as other methods