Re: [Bug #12650] Strange load average and ksoftirqd behavior with 2.6.29-rc2-git1

[Damien Wyart]

* Ingo Molnar <mingo@xxxxxxx> [090216 13:26]:
> We do get 0x100 which is 1 << RCU_SOFTIRQ, i.e. the RCU softirq. Paul, 
> this indeed seems to be a CONFIG_TREE_RCU=y bug.

> What is weird is that RCU_SOFTIRQ gets set again and again - but there's 
> no raise_softirq() calls. Could you please do a two-CPU trace too via:

>    echo 3 > /debug/tracing/tracing_cpumask

> So that we can see what's happening on the other CPU?

> Also, could you please apply the debug patch below (or update to the 
> very latest -tip tree), so that we get trace entries of softirq triggers 
> too?

Ok, the new trace with these additional modifications is here:
http://damien.wyart.free.fr/ksoftirqd_pb/trace_tip_2009.02.16_1300_ksoftirqd_pb_abstime_proc_mask3.txt.gz

-- 
Damien
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/