On Mon, Oct 24, 2005 at 09:24:33AM -0700, Badari Pulavarty wrote:
> On Sun, 2005-10-23 at 17:47 -0700, Paul E. McKenney wrote:
> > On Sun, Oct 23, 2005 at 12:05:21PM -0700, Andrew Morton wrote:
> > > Ingo Oeser <[email protected]> wrote:
> > > >
> > > > DEBUG_KERNEL should do nothing more than showing the debugging
> > > > options.
> > >
> > > yup.
> > >
> > > > E.g. I don't expect to enable any additional code in an
> > > > unrelated file, if I enable Magic-SysRQ on an embedded, unattended device
> > > > to be able to analyze potential problems via serial console.
> > > >
> > > > @Andrew: Would you accept a patch to fix that?
> > >
> > > more yup.
> >
> > OK, the attached patch covers this and also fixes the redundant #include
> > that Greg KH spotted.
> >
> > Thoughts?
>
> Paul,
>
> I enabled RCU_TORTURE_TEST in 2.6.14-rc5-mm1. My machine took 10+
> minutes to boot and let me login. RCU kthreads are hogging the CPU.
> Is this expected ?
If you did CONFIG_RCU_TORTURE_TEST=y, then yes.
I do CONFIG_RCU_TORTURE_TEST=m so that I can just do a "modprobe rcutorture"
when I want to start the test. Also allows me to do several runs per boot
with different arguments.
I wonder if I should somehow exclude "=y" on this one -- I haven't come
up with any case where it is useful.
Thoughts?
Thanx, Paul
> Thanks,
> Badari
>
> top - 15:32:55 up 22 min, 1 user, load average: 10.96, 12.07, 9.18
> Tasks: 94 total, 11 running, 83 sleeping, 0 stopped, 0 zombie
> Cpu(s): 2.5% us, 97.5% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi,
> 0.0% si
> Mem: 7145152k total, 350656k used, 6794496k free, 50876k buffers
> Swap: 1048784k total, 0k used, 1048784k free, 160168k cached
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 168 root 20 -5 0 0 0 R 50.2 0.0 10:44.01
> rcu_torture_rea
> 171 root 20 -5 0 0 0 R 50.2 0.0 10:47.86
> rcu_torture_rea
> 175 root 20 -5 0 0 0 R 50.2 0.0 10:49.83
> rcu_torture_rea
> 169 root 20 -5 0 0 0 R 49.9 0.0 10:47.07
> rcu_torture_rea
> 172 root 20 -5 0 0 0 R 49.9 0.0 10:50.04
> rcu_torture_rea
> 173 root 20 -5 0 0 0 R 49.9 0.0 10:43.79
> rcu_torture_rea
> 174 root 20 -5 0 0 0 R 49.9 0.0 10:39.16
> rcu_torture_rea
> 170 root 20 -5 0 0 0 R 40.2 0.0 10:38.68
> rcu_torture_rea
>
>
>
>
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