Messages in this thread | | | Date | Fri, 21 Sep 2012 15:03:03 -0700 | From | "Paul E. McKenney" <> | Subject | Re: rcu self-detected stall messages on OMAP3, 4 boards |
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On Fri, Sep 21, 2012 at 01:31:49PM -0700, Tony Lindgren wrote: > * Paul E. McKenney <paulmck@linux.vnet.ibm.com> [120921 12:58]: > > > > Just to make sure I understand the combinations: > > > > o All stalls have happened when running a minimal userspace. > > o CONFIG_NO_HZ=n suppresses the stalls. > > o CONFIG_RCU_FAST_NO_HZ (which depends on CONFIG_NO_HZ=y) has > > no observable effect on the stalls. > > The reason why you may need minimal userspace is to cut down > the number of timers waking up the system with NO_HZ. > Booting with init=/bin/sh might also do the trick for that.
Good point! This does make for a very quiet system, but does not reproduce the problem under kvm, even after waiting for four minutes. I will leave it for more time, but it looks like I really might need to ask Linaro for remote access to a Panda.
Thanx, Paul
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