Re: [PATCH] [2.6] PPC64: log firmware errors during boot.

[Jake Moilanen <moilanen@austin.ibm.com>]

On Thu, 8 Jul 2004 11:03:37 -0500
linas@austin.ibm.com wrote:

> On Tue, Jul 06, 2004 at 08:41:16AM -0500, Jake Moilanen wrote:
> > 
> > > > Firmware can report errors at any time, and not atypically during boot.
> > > > However, these reports were being discarded until th rtasd comes up,
> > > > which occurs fairly late in the boot cycle.  As a result, firmware
> > > > errors during boot were being silently ignored.
> > 
> > Linas, the main consumer of error-log is events coming in from
> > event-scan.  We don't call event-scan until rtasd is up (eg they are
> > queued in FW until we call event-scan).  
> 
> Actually, they don't seem to be queueed at all; when I turned on 
> logging earlier, a whole pile of messages poped out that weren't 
> visible before.

event-scan is called every 30 seconds.  FW has to queue them.

If you are seeing a different pile of messages, I would imagine the
messages that popped out are not coming from event-scan then.  Might be
last_error, which messages do not come in from event-scan.  I can see
them not being logged in early boot.  

A problem I could see, is if we make an rtas call before the VM
is up.  The kmalloc for last_error won't like that.

Jake