Problems with ath at kern.hz=100

[Bengt Ahlgren]

Bengt Ahlgren <bengta at sics.se> writes:

> Ian Smith <smithi at nimnet.asn.au> writes:
>
>> On Mon, 9 Feb 2009, Bengt Ahlgren wrote:
>>
>>  > I was changing kern.hz to 100 on my IBM X40 (Pentium-M) laptop to see
>>  > whether that saves some battery, but ran into problems with ath not
>>  > working properly.  At first I thought that my hardware was failing,
>>  > but changing hz back to 1000 solved the problem.  I am running
>>  > 7.1-RELEASE-p1 and have the following Atheros chip:
>>  > 
>>  > Feb  9 11:13:10 P142 kernel: ath_hal: 0.9.20.3 (AR5210, AR5211, AR5212, RF5111, RF5112, RF2413, RF5413)
>>  > Feb  9 11:13:10 P142 kernel: ath0: <Atheros 5212> mem 0xd0200000-0xd020ffff irq 11 at device 2.0 on pci2
>>  > Feb  9 11:13:10 P142 kernel: ath0: [ITHREAD]
>>  > Feb  9 11:13:10 P142 kernel: ath0: WARNING: using obsoleted if_watchdog interface
>>  > Feb  9 11:13:10 P142 kernel: ath0: Ethernet address: 00:05:4e:4e:1f:c7
>>  > Feb  9 11:13:10 P142 kernel: ath0: mac 5.6 phy 4.1 5ghz radio 1.7 2ghz radio 2.3
>>
>> There's an order of magnitude room to move between 100 and 1000 Hz.  
>> You could also try with maybe 250 or 500?
>
> I have been running with hz=250 for a while now without the problem
> occuring.

Just when sending this off, it also happened with hz=250.

Bengt