kern/118093: firewire bus reset hogs CPU, causing data to be lost

[Sean Bruno]

The following reply was made to PR kern/118093; it has been noted by GNATS.

From: Sean Bruno <sbruno at miralink.com>
To: Dieter <freebsd at sopwith.solgatos.com>
Cc: freebsd-firewire at freebsd.org, bug-followup at FreeBSD.org
Subject: Re: kern/118093: firewire bus reset hogs CPU,	causing data to be
 lost
Date: Mon, 15 Dec 2008 21:14:32 -0800

 Dieter wrote:
 > I found the source of this problem.  When a firewire bus resets,
 > the firewire driver prints a few lines to the console,
 > using printf(9) and device_printf(9).  I suspect that these are
 > running at splfw aka splimp, locking out other i/o.
 >
 > Commenting out the *printf() calls fixes the problem, but that
 > isn't a good solution.
 >
 > Would changing the *printf() calls to log(9) calls be safe?
 > ("safe" meaning other i/o doesn't get locked out)
 >
 > Ah, for the good old days when 19200 baud seemed fast...
 > _______________________________________________
 >   
 Which one are you looking at Dieter?
 
 Sean