Re: Debugger break on busy system
On Sat, Jan 04, 2003 at 11:38:39AM +0100, Benjamin Herrenschmidt wrote:
> On Sat, 2003-01-04 at 11:22, Sven Luther wrote:
> > On Sat, Jan 04, 2003 at 10:02:47AM +0100, Benjamin Herrenschmidt wrote:
> > > On Fri, 2003-01-03 at 00:32, Michael D. Crawford wrote:
> > > > Sometimes when my 8500 is particularly busy with SCSI disk I/O in some ext2
> > > > filesystems, the system drops into the kmon debugger.
> > > >
> > > > I'm afraid I don't know where it breaks because I don't have a debug build and
> > > > I'm not yet very hip to how to use kmon.
> > >
> > > xmon you mean ?
> > >
> > > Tell me what xmon says, that would be a good first step (what cause of
> > > entry). Also, copy the values for NIP (PC), LR, and backtrace (obtain
> > > this with the "t" command) and send me those values along with the
> > > System.map of the kernel you are running.
> >
> > Mmm, is there a xmon doc or howto or something such ?
>
> Not really... xmon itself has a short help you can get by pressing "?", but for
> more details, you'd rather look at the source.
Ok, thanks, ...
BTW, do you know if a 3 wire null modem cable is enough for viewing
bootlog messages on a serial console ? What would be the best tool to
look at the serial console from the other side ?
Friendly,
Sven Luther
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