Lockups with SMP

Leonardo Pereira Santos lsantos at pd3.com.br
Mon Jun 30 10:29:21 EDT 2003

Hash: SHA1

I have a similar problem with a embedded board running hostap. So this problem 
might not occur only on SMP setups, but on slow speed processor systems as 
well. Any help to solve thi sproblem is aprreciated and quoting Jirka Bohac:

"If I can do anything to help solve this issue, I will try - it's a major
problem for many in our network."


On Friday 27 June 2003 17:05, Jiri Fojtasek wrote:
> Jirka Bohac wrote:
> >>I am just wondering if there is any progress on lockups involving SMP
> >>machines.
> >
> >...
> >
> >>then followed by "hostap_pci: wlan0: resetting card", then nothing.
> >
> >This obviously is not just a SMP issue. We have the same problems on
> >uniprocessor machines. Some people have more luck with fast computers,
> >slower ones (like my P100) seem to suffer more.
> >
> >My explanation to this is, that there is some locking problem (either
> >insufficient locking or a deadlock) and, on the fast computer, the first
> >of the conflicting events is likely to be finished before it is
> >interrupted by the second... ???????
> >
> >Upgrading to hostap-0.0.3 increased the average uptime significantly,
> >most likely because card resets occur much less frequently than with
> >previous versions. For the same reason, upgrading to the latest (1.5.6)
> >firmware helped.
> >
> >Now my system "only" hangs about once every other day.
> >I have 3 ZCOM XI-626 cards, each of them under permanent load of about
> >100-300kB/s. One of them is in managed mode, the other two are masters.
> >P100, 2.4.21pre7
> >
> >If I can do anything to help solve this issue, I will try - it's a major
> >problem for many in our network.
> >
> >
> >Jirka
> >CZFree.Net, Prague, Czechia
> >
> >
> >_______________________________________________
> >HostAP mailing list
> >HostAP at shmoo.com
> >http://lists.shmoo.com/mailman/listinfo/hostap
> Hello
> IMHO i think XI-626 need a PCI revision 2.1 or 2.2 ? Iam using a boards
> that pass PCI revision requirements and not have those problems (d-com
> and sparklan wl-360, avreage 10-15 associated clients) . In some routers
> iam also using low cost motherboards (with via C3 on board) with no
> problems ... IMHO maybe coming time turn off  old p100 router and
> upgrade it, to pass basic PCI bus requirements with the wlan card ... I
> using my own patch to solve BAP busy timeouts, maybe its a goal or me
> (from pre 0.0.1 to current 0.0.3) ...
> Jiri
> _______________________________________________
> HostAP mailing list
> HostAP at shmoo.com
> http://lists.shmoo.com/mailman/listinfo/hostap

- -- 

Leonardo Pereira Santos
Engenheiro de Projetos
PD3 Tecnologia
av. Pará 330/202
(51) 3337 1237

Today Fortune tells us:
Love is being stupid together.
		-- Paul Valery
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