ndis0 interrrupt storm

Chris Whitehouse cwhiteh at onetel.com
Sat May 2 09:20:42 UTC 2009

Paul B. Mahol wrote:
> On 5/2/09, Paul B. Mahol <onemda at gmail.com> wrote:
>> On 5/1/09, Chris Whitehouse <cwhiteh at onetel.com> wrote:
>>> Paul B. Mahol wrote:
>>>> On 4/29/09, Chris Whitehouse <cwhiteh at onetel.com> wrote:
>>>>> Hi all
>>>>> I'm trying to get a Linksys WPC54Gv5 wireless pccard working. It has a
>>>>> Marvell 8335 chip. I've created a module with ndisgen and I can see
>>>>> ndis0. When I up it with ifconfig I immediately get repeated messages:
>>>>> Apr 28 23:23:19 pcbsd kernel: interrupt storm detected on "irq11:";
>>>>> throttling interrupt source
>>>>> As soon as I down the interface the messages stop.
>>>>> I've also tried starting ndis0 with polling
>>>>> # ifconfig ndis0 inet polling
>>>>> but still get the messages. I guess this driver doesn't support
>>>>> polling.
>>>>> Or I've got the syntax wrong.
>>>> That command is not currently efective at all for ndisX(I yet have to
>>>> see if it is possible).
>>>>> According to vmstat -i irq11 is used by cbb0 and pcm0. ndis0 is on irq9
>>>>> irq9: cbb1 ndis0++
>>>>> This is on PCBSD 7.1 which is FreeBSD 7.2-PRERELEASE
>>>>> Any way I can get this thing working?
>>>> Try yo disable cbbX if you dont use it or enable MSI for pcm0 (if
>>>> possible).
>>> This is a pcmcia card in a laptop so cbb is needed :( There is no
>>> reference to msi in the pcm man page so I guess it is not available for
>>> this system. (Paul I saw a post from you on multimedia about msi in hdac
>>> and sure enough there is a reference to msi in snd_hda(4) man page). Am
>>> I looking in the right place?
>> msi for snd_hda(if that is your sound driver) should be enabled by default
>> on CURRENT (dunno about 7):
>> hint.hdac.%d.msi=1

my driver is snd_t4dwave and msi is not mentioned in the man page. Does 
that mean it's not available?

>> You could try to use different dev.ndis.0.InterruptNumber for ndis0.
>> Changing it via sysctl is not supported, you will need to modify right
>> line(s)
>> in inf file, or in .h file generated with ndiscvt(1) via ndisgen(8)
>> Dunno if that will work .... (never tried)
> Tried, doesnt work. Polling could be enabled if miniport driver for your
> card supports it, look output of sysctl dev.ndis.0

no reference to polling in sysctl dev.ndis

hmm not looking good so far


More information about the freebsd-questions mailing list