Re: b44: regression in 2.6.22 (resend)

Thomas Gleixner
2007-06-04T06:40:06Z

On Sun, 2007-06-03 at 18:26 +0200, Maximilian Engelhardt wrote:
> > Is there any other strange behavior of the high res enabled kernel than
> > the b44 problem ?
>
> I didn't notice anything in the past (as I wrote). But today I did some tests
> for an updated version of the p54 mac80211 wlan driver and I noticed exactly
> the same problem:
>
> when booting with highres=off everything is fine.
> But when I boot an highres enabled kernel and I do the iperf-test with the p54
> driver, my systems becomes unresponsive during the test. It seems to be
> exactly the same problem I have with the b44 driver.
> So this might not be a bug in the b44 code but a bug somewhere in the linux
> networking code.
>
> I did the test with an 2.6.22-rc3-git4 kernel and the p54 driver built
> external as module.

Can you look at iperf to figure out, whether it does some weird timer
stuff (high frequency interval timer or such) ? Either check the code or
strace it.

tglx