linux-kernel - Re: [PATCH 0/5] ARM: orion5x/dove/mv78xx0 multiplatform

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20151211133601.GB18249@io.lakedaemon.net>
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/