I've experienced much the same problem with lockups on the TS-7260 - some site
lockup, some don't. I've recently uncovered a serious problem with the
Netwinder Floating Point Emulator which clearly contributes to this lockup
problem.
Symptoms are messages about NWFPE exceptions in the dmesg buffer. If you're
lucky you can invoke `nwfpe` to see them before the system locks up - dmesg
overwrites them upon reboot. I ended up writing some code based on
/etc/init.d/bootmisc.sh which logs the dmesg output to a file, I then had a
record of the messages even after a reboot. I'm still early in the
investigation, but suspect that some sites may produce specific conditions/data
that trips the NWFPE more often.
Finding and eliminating my own code which caused the NWFPE exceptions went a
long way to improving the situation. But I'm very concerned about this type of
fix for the long run.
--- In sean <> wrote:
>
> Is your watchdog being "patted" from the main loop of your main application,
> or do you have an additional process which pats it? If the latter, then
> maybe
> your main process is crashing but the pat process remains running
> (you've prob. thought of this already).
>
> We used the watchdog on the TS-7260 and it reset the board reliably.
>
> Sean
>
> On Mon, Jul 27, 2009 at 12:33 PM, naturalwatt <>wrote:
>
> >
> >
> > --- In <ts-7000%40yahoogroups.com>, Petr ©tetiar
> > <ynezz@> wrote:
> > >
> > > naturalwatt <martin@> [2009-07-24 11:25:44]:
> > >
> > > > I am using a watchdog program that uses the TX watchdog, and although
> > the
> > > > watchdog program seems to work, it does not prevent these lockups that
> > > > require power cycling. When I say the watchdog program works, if I kill
> > > > -STOP it, the TS7250 reboots within about 5 seconds.
> > >
> > > Sorry my ignorance, but what's TX watchdog? What's your kernel version,
> > > patchset used?
> > >
> > > -- ynezz
> > >
> >
> > It's a typo! Should be TS watchdog as documented in TS7250 manual which is
> > in the FPGA, not in the EP9302 which is reported to "have issues" . Kernel
> > is standard as shipped, TS2.4.26-ts11.
> >
> >
> >
>
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