Re: [Bug #11989] Suspend failure on NForce4-based boards due to chanes in stop_machine

Heiko Carstens
2008-11-11T16:14:01Z

> > Could you please apply the following debug patch (due to Jiangshan and
> > myself)? Then you should be able to build with CONFIG_RCU_TRACE,
> > then mount debugfs after boot, for example, on /debug. This will
> > create a /debug/rcu directory with three files, "rcucb", "rcu_data",
> > and "rcu_bh_data". Since you are still able to log in, could you
> > please send the contents of these three files?
> >
> > Thanx, Paul
>
> This time with the patch actually attached... Thanks to Peter Z.
> for alerting me to my omission.

Well, your patch doesn't apply on git head. However I used preemptible
RCU instead and had tracing enabled.

This is the output of the three files after it stalled (and continued,
because I caused an interrupt by sending a network packet) twice:

[root@h0545001 rcu]# cat rcuctrs
CPU last cur F M
1 0 0 1 1
3 0 0 1 1
4 0 0 0 0
5 0 0 0 1
6 0 0 0 0
ggp = 1640, state = waitack

[root@h0545001 rcu]# cat rcugp
oldggp=1652 newggp=1655

[root@h0545001 rcu]# cat rcustats
na=33948 nl=3 wa=33945 wl=0 da=33945 dl=0 dr=33945 di=0
1=0 e1=0 i1=1674 ie1=4 g1=1670 a1=1920 ae1=251 a2=1669
z1=1669 ze1=0 z2=1669 m1=4411 me1=2742 m2=1669