On Tuesday 06 January 2009, you wrote:
> On Monday 05 January 2009, you wrote:
> > On Thu, Jan 01, 2009 at 02:44:20PM +0100, W. van den Akker wrote:
> > > I have tested on the server with the latest wireless-testing the past
> > > days (2.6.28-rc9-wl). The wireless-testing looks somewhat more stable
> > > then the compat-wireless.
> > >
> > > I have also installed the netconsole module to watch any kernel prints.
> > > After running hostapd (v0.6.6) from command line the AP is
> > > up-and-running. Then if I connect with the laptop (tested it with
> > > kernel .26 and .28 on the laptop) I get a connection and can start a
> > > browser en explore the internet. If I start a second session (Kmail or
> > > second browser) the
> > > server hangs within a minute. Leaving again no trace on the console,
> > > hostapd-log or netconsole.
> >
> > Just to make sure I understood this correctly.. Does this happen with
> > just a single association station (your laptop)? What are you referring
> > to with a "session"? Just another program using network (i.e., no new
> > wireless associations, etc.)? As far as the ath9k driver is concerned,
> > new applications (e.g., new TCP connection) should not really matter
> > much.. If you have IEEE 802.11n enabled, could you please run a test
> > with it disabled to make sure this is not related to frame aggregation?
> >
> > As far as getting any output from the system is concerned, the next step
> > could be to see if NMI watchdog would be able to provide any help.
> > Please take a look at Documentation/nmi_watchdog.txt in the kernel
> > source code and see if you could use that on the AP to get some output
> > when the system hangs (running without X on console to make sure you see
> > the output).
>
> Hi Jouni,
>
> Yes you understood correctly. Only a laptop, start a browser then start
> Kmail over the same wireless connection. Then it hangs. This is always
> reproducable. There are also other sorts or hangups (for example when
> starting hostapd, but that is not always reproducable when it happens).
>
> I will try today the watchdog-suggestion. Hope that it will provide some
> help.
I have enabled the NMI_watchdog (see below)
CPU0 CPU1
0: 322372 0 IO-APIC-edge timer
1: 12 0 IO-APIC-edge i8042
4: 101 0 IO-APIC-edge serial
6: 3 0 IO-APIC-edge floppy
7: 0 0 IO-APIC-edge parport0
8: 2 0 IO-APIC-edge rtc0
9: 0 0 IO-APIC-fasteoi acpi
12: 4 0 IO-APIC-edge i8042
16: 0 0 IO-APIC-fasteoi uhci_hcd:usb1
17: 6282 0 IO-APIC-fasteoi eth1
18: 364152 0 IO-APIC-fasteoi ata_piix, ata_piix, eth0
19: 0 0 IO-APIC-fasteoi uhci_hcd:usb2
21: 1727 0 IO-APIC-fasteoi ath
23: 0 0 IO-APIC-fasteoi ehci_hcd:usb3
27: 89 0 IO-APIC-fasteoi aic79xx
NMI: 322364 322307 Non-maskable interrupts
LOC: 0 322302 Local timer interrupts
RES: 10695 24691 Rescheduling interrupts
CAL: 36 112 Function call interrupts
TLB: 2371 3165 TLB shootdowns
TRM: 0 0 Thermal event interrupts
SPU: 0 0 Spurious interrupts
ERR: 0
MIS: 0
However, after starting a internet session and Kmail session the server hangs
again without any output. Does the NMI-handler not process per CPU? So if one
CPU hangs, the other would still proceed?
I have no 802.11n enabled, nor X.
This means I think the system halted hard 'hlt-instruction'
Any further suggestion? I am little bit hopeless now. I have placed the PCI
card into another slot, no result.
gr,
Willem
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