Re: [git pull] FireWire fixes

From: Maxim Levitsky
Date: Fri Sep 17 2010 - 20:00:23 EST


On Sat, 2010-09-18 at 01:41 +0200, Stefan Richter wrote:
> Maxim Levitsky wrote:
> > Running new stack on the laptop + old stack on the desktop gave me about
> > 18-30 Mbit/s speeds varying all the time.
> > Running both with the new stack results in corrupted packets and sftp
> > exits immediately.
>
> firewire-net, the IP over 1394 driver, is still marked as experimental not
> because somebody forgot to remove that mark but because we mean it. But so is
> its older counterpart, eth1394. Both eth1394 and firewire-net are chronically
> underused and undermaintained.
I sure do understand it!
I just did another round of testing and report the results.

Do you have an idea what could cause such low speeds?


>
> > The problems I so hoped to be fixed in new stack still persist:
> >
> > Cable disconection/reconnection still results in the link loss till
> > ifconfig down/up.
> >
> > Suspend/resume also results in the link loss.
>
> Sounds like something that shouldn't be too hard to fix by anybody who can
> spare the time. Surely a higher-level problem somewhere in firewire-net.
>
> > Driver still has panics on some occasions.
>
> At the moment I suspect that this OTOH might not be a firewire-net problem but
> possibly a race in firewire-ohci which is only triggered by workload as
> firewire-net imposes it (heavy AT context usage).
Thanks for information!

Best regards,
Maxim Levitsky


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