On Fri, Sep 21, 2012 at 01:31:49PM -0700, Tony Lindgren wrote:

* Paul E. McKenney [off-list ref] [120921 12:58]:

quoted

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