Hello Stanislaw, thank you for spending your time for this problem! Am Wed, 24 Aug 2011 11:03:41 +0200 schrieb Stanislaw Gruszka <sgruszka@xxxxxxxxxx>: > On Tue, Aug 23, 2011 at 11:07:36AM +0200, Andreas Hartmann wrote: > > using rt2800usb with a Linksys WUSB600N v2 (rt3572) crashes the complete > > machine (SMP, Core i5, linux 3.0) on unloading the module after using it > > for a short period of time: > > - 2 times netperf -t TCP_MAERTS -H host > > - 2 times netperf -t TCP_STREAM -H host > > > > The error message in /var/log/messages is: > > > > phy0 -> rt2800_wait_wpdma_ready: Error - WPDMA TX/RX busy, aborting > > > > After the crash, you have to hard reset the machine. > Did you hibernate machine anytime before the rmmod ? No, there was no suspend / resume done with this module at all. I think, the problem of this hang is located elsewhere. To get more information, I switched on debugging of the rt2x00-driver and did the tests again. During the tests, I get tons of these warnings in /var/log/messages: Aug 24 13:01:55 pc kernel: [22286.549510] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 36 Aug 24 13:01:55 pc kernel: [22286.549530] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 37 Aug 24 13:01:55 pc kernel: [22286.549546] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 39 Aug 24 13:01:55 pc kernel: [22286.549560] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 40 Aug 24 13:01:55 pc kernel: [22286.550511] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 42 Aug 24 13:01:55 pc kernel: [22286.550749] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 44 Aug 24 13:01:55 pc kernel: [22286.550766] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 46 Aug 24 13:01:55 pc kernel: [22286.550780] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 47 Aug 24 13:01:55 pc kernel: [22286.551756] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 48 Aug 24 13:01:55 pc kernel: [22286.552006] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 50 Aug 24 13:01:55 pc kernel: [22286.552032] phy0 -> rt2800usb_txdone_entry_check: Warning - TX status report missed for queue 2 entry 52 (about 144/s) Another entry is: Aug 24 12:59:46 pc kernel: [22157.608241] phy0 -> rt2x00usb_watchdog_tx_status: Warning - TX queue 0 status timed out, invoke forced tx handler The measured throughput is: - to STA (-> where rt2800usb runs) is about 4 MB/s. - from STA is about 1 _k_B/s. The Linksys WUSB600N V2 dongle should have a throughput of about 10 M/s in both directions! I think, if the handling of the queues is fixed, the problem of the hanging machine will be gone, too! If I should test some patches or if you want need some more information - please ask, I'll try to provide them! Kind regards, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
