On Tue, Jul 12, 2011 at 11:12:57AM +0100, Lorenzo Pieralisi wrote: > Thank you very much Russell for this recap. > > On Mon, Jul 11, 2011 at 07:40:10PM +0100, Russell King - ARM Linux wrote: > > On Mon, Jul 11, 2011 at 03:00:47PM +0100, Lorenzo Pieralisi wrote: > > > Well, short answer is no. On SMP we do need to save CPU registers > > > but if just one single cpu is shutdown L2 is still on. > > > cpu_suspend saves regs on the stack that has to be cleaned from > > > L2 before shutting a CPU down which make things more complicated than > > > they should. > > > > Hang on. Please explain something to me here. You've mentioned a few > > times that cpu_suspend() can't be used because of the L2 cache. Why > > is this the case? > > > > OMAP appears to have code in its sleep path - which has been converted > > to cpu_suspend() support - to deal with the L2 issues. > > > > OMAP4, it is SMP configs I am talking about.
Seriously, that's not something which really concerns me at present because suspend/resume in any form is not supported there in any form in mainline. All my comments are based on the mainline kernel. That's what I work with. Everything elsewhere is not my concern. So, let me say again. OMAP suspend/resume support _in_ _mainline_ will be converted at the next merge window. As that's only OMAP3 _in_ _mainline_ which has the need for saving state etc, that's the only OMAP code I have access to, and therefore that's the only thing which I've been able to fix. OMAP4 suspend/resume support doesn't exist in mainline and therefore doesn't exist for me. _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev