Re: linux-2.6.28-rc2 regression : oprofile doesnt work anymore ?

Andi Kleen
2008-11-07T16:39:20Z

On Fri, Nov 07, 2008 at 05:12:33PM +0100, Eric Dumazet wrote:
> Andi Kleen a écrit :
> >On Fri, Nov 07, 2008 at 04:13:42PM +0100, Eric Dumazet wrote:
> >>Andi Kleen a écrit :
> >>>Can you please test this patch and see if it solves the problem?
> >>>
> >>>Thanks,
> >>>-Andi
> >>>
> >>>---
> >>>
> >>>oprofile: Fix p6 counter overflow check
> >>>
> >>>Fix the counter overflow check for CPUs with counter width > 32
> >>>
> >>>I had a similar change in a different patch that I didn't submit
> >>>and I didn't notice the problem earlier because it was always
> >>>tested together.
> >>>
> >>>Signed-off-by: Andi Kleen <ak@linux.intel.com>
> >>>
> >>Thanks Andi
> >>
> >>Unfortunatly, there is still a freeze of NMIS after a while.
> >
> >How long is the while?
> >
>
> Less than 20 seconds if fully loaded with "tbench 8" on my 8 cpus machine.

I don't have tbench on the test box, but when I load it with a couple
of while true ; do true ; done loops it also continues sampling.

Are you sure it worked in 2.6.27?

-Andi