On Thu, Dec 04, 2014 at 10:37:39AM -0500, Pranith Kumar wrote:
> On 12/04/2014 01:27 AM, Paul E. McKenney wrote:
> > For the moment, I applied this to -rcu against v3.18-rc6 to get some 0day
> > testing on it.
> >
> > There are conflicts against the tip of my tree, but will worry about
> > that later. I don't have a ready answer on whether or not this needs
> > to be split up -- in the worst case, we would add the SRCU Kconfig
> > parameter, add all the selects, then once they all hit mainline add the
> > Makefile change.
> >
> > We will need stats on how much memory was saved, and a "size
> > kernel/rcu/srcu.o"
> > after a UP/tiny build should do it. Could you please add this to the
> > commit log?
> >
>
> So if we do not select CONFIG_SRCU, srcu.o will not be compiled at all. So we
> should save about
>
> text data bss dec hex filename
> 2007 0 0 2007 7d7 kernel/rcu/srcu.o
>
> as in size of arch/powerpc/boot/zImage changes from
>
> text data bss dec hex filename
> 831552 64180 23944 919676 e087c arch/powerpc/boot/zImage :
> before
> 829504 64180 23952 917636 e0084 arch/powerpc/boot/zImage : after
>
> so about ~2000 bytes I guess.
Nice!
Josh, I recall you having a tinified .config somewhere, but don't see it
right off. If you do have one, could you please share it with Pranith?
Not a big deal, just don't want to overstate the savings too much. ;-)
Thanx, Paul
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
