Messages in this thread | | | Date | Fri, 11 Dec 2015 14:55:54 +0000 | From | Jason Cooper <> | Subject | Re: [PATCH 0/5] ARM: orion5x/dove/mv78xx0 multiplatform |
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On Fri, Dec 11, 2015 at 03:46:53PM +0100, Arnd Bergmann wrote: > On Friday 11 December 2015 13:36:01 Jason Cooper wrote: > > +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. > > I think you are right this has come up in the past, but I don't see how > it would work in practice without significant changes to driver subsystems: > > The way we describe devices in DT is often very different from what we > have for the traditional board files, and in some cases we don't even > support platform data any more, so this would still depend on having > properties according to the DT bindings, and require a large chunk of > the same code that is doing DT at the moment.
yes, that's unfortunate. Perhaps the tinification links are still helpful to Detlef.
thx,
Jason.
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