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Re: [lwip-users] TCP causing out of mem pool [RAW]

From: Chris_S
Subject: Re: [lwip-users] TCP causing out of mem pool [RAW]
Date: Tue, 28 Jul 2009 15:11:31 -0700

Well it's still running, still serving pages, so things look good.

Kieran said that lwIP was not closing the connections, like the other end
was.  So does that mean it is still doing something wrong?  I've attached
the PCAP file.

I'll check the other HTTPd versions later, and I will also be checking the
CGI functions next.  It also has a simple ROM file setup.

Thanks, Chris.

> I also double-checked our httpd_raw in contrib, and it does kill a
> TIME_WAIT pcb. However, we might want to get rid of the warning in
> memp_malloc somehow because you aren't the first user confused about
> this message.
> Out of interest, do other httpds work now or our httpd in contrib, or do
> all work? The reason I'm asking is I might be needing a POST-enabled (or
> even complete CGI-enabled) httpd some time in the next months and wonder
> if I should extend the one in contrib or take an existing one (if there
> is one that is bug-free an freely available)...
> Simon
> Chris_S wrote:
> >> lwIP goes through all 31 PCBs, but should then recycle them from
> >> TIME_WAIT either when the timer expires or it needs one and there
> >> any free.
> >>
> >
> > I get it, yes I think it is working. I get a bunch of msgs about out of
> > but TCP keeps working now.
> >
> > I set GCC for -O0 so I could get a decent call stack,
> > and I think I found the source of the flaky behavior.
> > It appears was due to a task performance trace I had running.
> > Appears not entirely critical section safe yet.
> > I just shut that section off for now, and no more crashes so far.
> >
> > I refreshed a bunch of times with IE and FF, not one miss yet.
> > Acts a lot more stable now.  I'll leave it running all day.
> >
> > Thanks,  Chris.
> >
> >
> >
> > _______________________________________________
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> > http://lists.nongnu.org/mailman/listinfo/lwip-users
> >
> >
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Attachment: lwip1.pcap
Description: Binary data

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