On Mon, Jul 25, 2011 at 09:08:20PM +0100, Russell King - ARM Linux wrote:

On Mon, Jul 25, 2011 at 11:49:43AM -0700, Scott Williams wrote:

quoted

In 2.6.39, CPU suspend/resumes crashes if an outer cache controller
(like a PL310) is configured and enabled. cpu_suspend only flushes
the L1 cache.

Correct.  cpu_suspend is been a _consolidation_ effort across the various
implementations.  Only one implementation deals with the L2 cache issues
at present.

A bunch of patches have gone in during this merge window to continue
that consolidation effort and improve the cpu_suspend interfaces.
Eventually the L2 cache issues will be dealt with in core code.

I seem to have the outer L2 stuff working pretty well in my latest kexec
series (my vexpress happily ran init=/kexec.sh all weekend). That should
hopefully provide all the necessary hooks in the core code. If not, we
should work something out.

I'll post what I have after the merge window (SMP still not quite there
yet).

Will