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From: Rob Landley <rob@landley.net>
To: Herbei Dacian <dacian_herbei@yahoo.fr>
Cc: Peter Maydell <peter.maydell@linaro.org>,
	QEmu Devel <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] minimal linux distribution for qemu
Date: Sun, 18 Aug 2013 00:00:39 -0500	[thread overview]
Message-ID: <1376802039.2737.52@driftwood> (raw)
In-Reply-To: <1376669826.26224.YahooMailNeo@web172602.mail.ir2.yahoo.com> (from dacian_herbei@yahoo.fr on Fri Aug 16 11:17:06 2013)

On 08/16/2013 11:17:06 AM, Herbei Dacian wrote:
> my system should run in far less memory. something like 2-4MB.
> but first I need to have a system running so that I can monitor with  
> qemu the addresses accessed for read execute and write by the code  
> run by the emulator.
> if I reach that is a real big deal.
> dacian

Linux 2.6 and later won't run in 2 megs at all. You can trim it down to  
4 megs on a nommu system (the page tables take up too much ram  
otherwise), but won't be able to do much.

Really, things like kobjects in the modern kernel take up too much  
space. Getting anything to work in 4 megs requires diabling all the  
printk strings at compile time. (The last time I saw somebody do a 4  
meg system was CELF in 2006. 32 bit x86.)

Look at the uClinux project. Or try to bolt your app onto uboot and run  
it on the bare metal.

Rob

  parent reply	other threads:[~2013-08-18  5:00 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-15  8:57 [Qemu-devel] minimal linux distribution for qemu Herbei Dacian
2013-08-15 11:53 ` Andreas Färber
2013-08-16 15:59   ` Rob Landley
2013-08-16 16:06     ` Herbei Dacian
2013-08-15 12:09 ` Stefan Hajnoczi
2013-08-15 13:22   ` Herbei Dacian
2013-08-15 13:31     ` Peter Maydell
2013-08-15 13:46       ` Herbei Dacian
2013-08-15 13:48         ` Peter Maydell
2013-08-15 14:01           ` Herbei Dacian
2013-08-15 14:05             ` Peter Maydell
2013-08-15 14:18               ` Herbei Dacian
2013-08-15 14:22                 ` Peter Maydell
2013-08-16 16:21                 ` Rob Landley
2013-08-16 16:05             ` Rob Landley
2013-08-16 16:17               ` Herbei Dacian
2013-08-16 17:46                 ` Andreas Färber
2013-08-18  5:00                 ` Rob Landley [this message]
2013-08-18 13:57                   ` Herbei Dacian
2013-08-20  8:38                     ` Rob Landley

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