On Fri, Sep 23, 2016 at 02:57:39PM -0500, Babu Moger wrote:
> We checked again. Yes, It goes in .bss section. But in sparc we have
> to fit .text, .data, .bss in 7 permanent TLBs(that is totally 28MB).
> It was fine so far. But the commit 1413c0389333 ("lockdep: Increase
> static allocations") added extra 4MB which makes it go beyond 28MB.
> That is causing system boot up problems in sparc.
*sigh*, why didn't you start with that :/
> Yes. We know it. This is a limitation. Changing this limit in our
> hardware is a much bigger change which we cannot address right away.
> So, we are trying to come up with a solution which can work for all. I
> will re-post the patches with CONFIG_BASE_SMALL option if there is no
> objections.
OK, so double check BASE_SMALL doesn't imply other things you cannot
live with, Sparc64 isn't a dinky system. If BASE_SMALL works for you
then good, otherwise do a PROVE_LOCKING_SMALL symbol that is not user
selectable and have SPARC select that. Use the invisible Help for that
symbol to explain all this again.
> CCing David Miller and Rob Gardner. They might be able to explain
> more if you have any more questions.
Nah, I think I remember enough of how the Sparc MMU works to see reason.
