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Date: Fri, 11 Dec 2015 13:36:01 +0000 From: Jason Cooper <jason@...edaemon.net> To: Arnd Bergmann <arnd@...db.de>, Josh Triplett <josh@...htriplett.org> Cc: Detlef Vollmann <dv@...lmann.ch>, linux-arm-kernel@...ts.infradead.org, Andrew Lunn <andrew@...n.ch>, Russell King <linux@....linux.org.uk>, Benjamin Cama <benoar@...ka.fr>, linux-kernel@...r.kernel.org, Gregory CLEMENT <gregory.clement@...e-electrons.com>, "Evgeniy A. Dushistov" <dushistov@...l.ru>, Sebastian Hesselbarth <sebastian.hesselbarth@...il.com> Subject: Re: [PATCH 0/5] ARM: orion5x/dove/mv78xx0 multiplatform +Josh Hey Arnd, Detlef, On Fri, Dec 11, 2015 at 12:10:55AM +0100, Arnd Bergmann wrote: > On Thursday 10 December 2015 23:00:24 Detlef Vollmann wrote: > > On 12/10/15 22:29, Arnd Bergmann wrote: > > > On Thursday 10 December 2015 22:14:25 Detlef Vollmann wrote: > > >> On 12/10/15 21:59, Arnd Bergmann wrote: > > > It may also be worth investigating what has made CONFIG_OF so costly, > > Probably because too much is done at runtime and too few things can > > be fixed at build time. > > > > > maybe we can reduce this a bit again. > > Probably not without turning the wheel backward :-( > > > > So for the test: yes it works, but I'm unhappy with it. > > I'm not too happy about adding 80kb to the uncompressed kernel > image either. I've spent some more time now trying to find where > we added the bloat. It's mainly in drivers, not in arch specific > code, a kilobyte here and there eventually adds up, but the largest > portion with a little over 50% of the total diff is drivers/of. Wasn't there an idea kicked around a while ago to create a dt2boardfile script/executable*? Then, during kernel configuration, you enable it and select which dts file you want. It would disable CONFIG_OF, multiplatform, etc. And generate a board_file.c from the dts file. If anything, it might be worth asking the kernel tinification [1], [2] folks if they'd be interested in taking this on... thx, Jason. * This may have been completely in my head... [1] http://events.linuxfoundation.org/sites/events/files/slides/tiny.pdf [2] https://tiny.wiki.kernel.org/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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