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From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
To: Tim Bird <tim.bird-mEdOJwZ7QcZBDgjK7y7TUQ@public.gmane.org>
Cc: Russell King - ARM Linux
	<linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
	Stephen Warren <swarren-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
	Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>,
	Rob Herring <rob.herring-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>,
	"linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
	<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	Olof Johansson <olof-nZhT3qVonbNeoWH0uzbU5w@public.gmane.org>,
	"linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
	<linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>
Subject: Re: [RFC PATCH 0/3] ARM: uncompress.h multi-platform enablement
Date: Wed, 26 Sep 2012 14:17:18 +0000	[thread overview]
Message-ID: <201209261417.18883.arnd@arndb.de> (raw)
In-Reply-To: <506307A0.7010701-mEdOJwZ7QcZBDgjK7y7TUQ@public.gmane.org>

On Wednesday 26 September 2012, Tim Bird wrote:
> Will those of us not interested in a single kernel binary
> that works everywhere be able to configure an ARM kernel image
> without a lot of bloat?

I'm not aware of increase in code size from the single kernel
image yet. If you find something, let us know.

For the platforms that are being converted to multiplatform in
3.7, the kernel binary should be essentially the same between
building a single-platform kernel before the patches, and a
multiplatform kernel with only one platform enabled after the
patches.

We had to add a few indirect function pointers, e.g. for
SMP startup, but that overhead is measured in bytes, not
kilobytes.

	Arnd

WARNING: multiple messages have this Message-ID (diff)
From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 0/3] ARM: uncompress.h multi-platform enablement
Date: Wed, 26 Sep 2012 14:17:18 +0000	[thread overview]
Message-ID: <201209261417.18883.arnd@arndb.de> (raw)
In-Reply-To: <506307A0.7010701@am.sony.com>

On Wednesday 26 September 2012, Tim Bird wrote:
> Will those of us not interested in a single kernel binary
> that works everywhere be able to configure an ARM kernel image
> without a lot of bloat?

I'm not aware of increase in code size from the single kernel
image yet. If you find something, let us know.

For the platforms that are being converted to multiplatform in
3.7, the kernel binary should be essentially the same between
building a single-platform kernel before the patches, and a
multiplatform kernel with only one platform enabled after the
patches.

We had to add a few indirect function pointers, e.g. for
SMP startup, but that overhead is measured in bytes, not
kilobytes.

	Arnd

  parent reply	other threads:[~2012-09-26 14:17 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-25 22:46 [RFC PATCH 0/3] ARM: uncompress.h multi-platform enablement Stephen Warren
2012-09-25 22:46 ` Stephen Warren
     [not found] ` <1348613212-21897-1-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-09-25 22:46   ` [RFC PATCH 1/3] ARM: move ICEDCC uncompress.h to common location Stephen Warren
2012-09-25 22:46     ` Stephen Warren
     [not found]     ` <1348613212-21897-2-git-send-email-swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-09-26 21:56       ` Domenico Andreoli
2012-09-26 21:56         ` Domenico Andreoli
2012-09-27  5:19         ` Stephen Warren
2012-09-27  5:19           ` Stephen Warren
2012-09-25 22:46   ` [RFC PATCH 2/3] ARM: mvebu: restore uncompress.h Stephen Warren
2012-09-25 22:46     ` Stephen Warren
2012-09-25 22:46   ` [RFC PATCH 3/3] ARM: tegra: move debug macros to include/debug Stephen Warren
2012-09-25 22:46     ` Stephen Warren
2012-09-26 10:38   ` [RFC PATCH 0/3] ARM: uncompress.h multi-platform enablement Arnd Bergmann
2012-09-26 10:38     ` Arnd Bergmann
     [not found]     ` <201209261038.36223.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 10:44       ` Russell King - ARM Linux
2012-09-26 10:44         ` Russell King - ARM Linux
     [not found]         ` <20120926104421.GA7040-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-09-26 12:05           ` Arnd Bergmann
2012-09-26 12:05             ` Arnd Bergmann
     [not found]             ` <201209261205.01351.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 13:10               ` Domenico Andreoli
2012-09-26 13:10                 ` Domenico Andreoli
2012-09-26 13:48           ` Tim Bird
2012-09-26 13:48             ` Tim Bird
     [not found]             ` <506307A0.7010701-mEdOJwZ7QcZBDgjK7y7TUQ@public.gmane.org>
2012-09-26 14:17               ` Arnd Bergmann [this message]
2012-09-26 14:17                 ` Arnd Bergmann
     [not found]                 ` <201209261417.18883.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 14:48                   ` Tim Bird
2012-09-26 14:48                     ` Tim Bird
     [not found]                     ` <506315A6.3090300-mEdOJwZ7QcZBDgjK7y7TUQ@public.gmane.org>
2012-09-26 14:49                       ` Arnd Bergmann
2012-09-26 14:49                         ` Arnd Bergmann
     [not found]                         ` <201209261449.48468.arnd-r2nGTMty4D4@public.gmane.org>
2012-09-26 15:10                           ` Russell King - ARM Linux
2012-09-26 15:10                             ` Russell King - ARM Linux
     [not found]                             ` <20120926151023.GC30938-l+eeeJia6m9vn6HldHNs0ANdhmdF6hFW@public.gmane.org>
2012-09-26 15:34                               ` Stephen Warren
2012-09-26 15:34                                 ` Stephen Warren
     [not found]                                 ` <50632096.7080208-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2012-09-28  3:53                                   ` Nicolas Pitre
2012-09-28  3:53                                     ` Nicolas Pitre
2012-09-27  5:37 ` Jean-Christophe PLAGNIOL-VILLARD
2012-09-27  5:37   ` Jean-Christophe PLAGNIOL-VILLARD

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