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List: freebsd-firewire
Subject: Re: kern/118093: [firewire] firewire bus reset hogs CPU,
From: Dieter <freebsd () sopwith ! solgatos ! com>
Date: 2009-05-11 7:00:14
Message-ID: 200905110700.n4B70EGT010504 () freefall ! freebsd ! org
[Download RAW message or body]
The following reply was made to PR kern/118093; it has been noted by GNATS.
From: Dieter <freebsd@sopwith.solgatos.com>
To: Gavin Atkinson <gavin@freebsd.org>
Cc: freebsd-firewire@freebsd.org, bug-followup@freebsd.org
Subject: Re: kern/118093: [firewire] firewire bus reset hogs CPU, causing data to be lost
Date: Sun, 10 May 2009 11:20:29 +0100
> > > This looks like it may be some bad
> > > interaction between the firewire stack and using a serial
> > > console. To submitter: It may be worth while switching to
> > > uart(4) rather than sio(4) for your serial ports and seeing
> > > if that makes any difference (as I don't think uart(4) uses
> > > the Giant lock).
> > Looks to me like commenting out sio doesn't work so well on my box.
> > Is that the wrong way to switch from sio to uart?
> > Is there something else I need to change instead, or in addition?
>
> You'll also need to add the uart hints to your device.hints file, if you
> haven't already, and update /etc/ttys.
>
> hint.uart.0.at="isa"
> hint.uart.0.port="0x3F8"
> hint.uart.0.flags="0x10"
> hint.uart.0.irq="4"
>
> /etc/ttys: you may find you need to change "ttyd0" to "ttyu0".
>
> Gavin
Thanks, with those changes it works with uart now.
The bad news is that switching from sio to uart didn't fix the
CPU hogging problem.
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