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From: Hans Petter Selasky <hselasky@c2i.net>
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Date: Wed, 14 Oct 2009 09:35:46 +0200
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Cc: bsduser <bsd@acd.homelinux.org>
Subject: Re: if_rum dies on transmit...
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On Wednesday 14 October 2009 01:41:09 bsduser wrote:
> Weongyo Jeong <weongyo.jeong@gmail.com> writes:
> > On Tue, Sep 29, 2009 at 01:57:46PM +0000, Poul-Henning Kamp wrote:
> >> Has anybody else seen if_rum die when you try to transmit a file over
> >> a TCP connection ?
> >>
> >> If I try to print across the network, upload a file with ftp or anything
> >> else of that general tenor, if_rum seems to hang the output queue and
> >> stops transmitting packets.
> >>
> >> Restarting wpa_supplicant mostly resolves the issue, but it does not
> >> on its own discover the problem.
> >>
> >> According to tcpdump(8), packets are still received.
> >>
> >> Any ideas ?
> >
> > Could you please test with attached patch?
> >
> > regards,
> > Weongyo Jeong
>
> I had the same issues with if_rum at least while using WPA and your patch
> made them go away.... ( although removing and plugging back in does not
> quite work )
>
> # scp INDEX-8* cookie:/usr/ports
> INDEX-8                                       100%   19MB   2.1MB/s   00:09
> INDEX-8.db                                    100%   34MB   2.4MB/s   00:14
>
> before the patch this would just hang.
>
> Another quick test using rsync on a bunch of files worked flawless too.
>
> usbconfig list:
>
> ugen7.2: <Compact Wireless-G USB Adapter Cisco-Linksys> at usbus7, cfg=0
> md=HOST spd=HIGH (480Mbps) pwr=ON
>
> The adapter is a WUSB54GC and yes, you made my day :-)

Weongyo:

Is the problem that some ifqueues go full and then the USB transfers are not 
restarted properly? Probably the other wlan network adapters have the same 
problem too and should be patched similarly.

--HPS