Messages in this thread | | | Date | Mon, 24 Oct 2005 15:54:38 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH] RCU torture-testing kernel module |
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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 <ioe-lkml@rameria.de> 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 > > > > - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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