[CUWiN-Dev] hslsd updates coming

[Bill Comisky]

On Thu, 22 Sep 2005, David Young wrote:

> On Thu, Sep 22, 2005 at 04:17:20PM -0500, Bill Comisky wrote:
>> On Wed, 21 Sep 2005, David Young wrote:
>>
>>> I have found some hslsd bugs by watching the Race Street network, which
>>> keeps growing with Tom Wiltzius' help, and by watching the indoor
>>> testbed. I have some fixes under development.
>>>
>>> Dave
>>
>> I've seen recently a few occasions where a node will reboot frequently,
>> though the intervals vary; sometimes hours between reboots and sometimes
>> minutes.  The ETX metric and beacon strength to the gateway from the node
>> in question looks like a solid link, and there is typically a fair amount
>> of traffic on the wireless network at the time... I have some cron jobs
>> fetching files on a few nodes, including the rebooting one.
>>
>> Once the node has rebooted, the evidence for what happened is gone, but I
>> have seen an hslsd segfault before, in dmesg output and /var/core/hslsd.*
>> files.  Is this symptomatic of the bugs you've found?
>
> I know of a rare condition where hslsd will segfault.  I'm working on
> a fix in the ls-refcnt-hsls branch.  There may be other conditions, too.
>
> If hellowdog finds that hslsd isn't running, it should not stop the
> watchdog tickle, but it should restart hslsd.  I guess it's possible hslsd
> will fail to restart if, say, the memory disk is full of core files....
>
>> I could tweak hellowdog to scp over some information before rebooting
>> (core files, dmesg output, etc); I guess you'd need the unstripped
>> binaries too.  Let me know if this would be useful.
>
> That would be very useful.

I've upgraded since the last time this happened (CUWiN and NetBSD srcs 
rsync'd to yours), and haven't seen it since; though the traffic pattern 
on the testbed may have changed as well.

> Now and again I have mentioned adding build stages that tar up the object
> directories ($BUILDDIR/O/, $BUILDDIR/Z/) for debugging later.

I saw the commits for the -S flag, I'll check it out.

bill

--
Bill Comisky
bcomisky at pobox.com