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Linux - Embedded & Single-board computer This forum is for the discussion of Linux on both embedded devices and single-board computers (such as the Raspberry Pi, BeagleBoard and PandaBoard). Discussions involving Arduino, plug computers and other micro-controller like devices are also welcome.

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Old 02-18-2011, 08:47 PM   #1
prabknow
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Registered: Feb 2011
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Directly accessing RAM not under the control of linux


Hello,

This is probably is naive question.

We have a system with 1 GB memory. Out of this, i would like to restrict only 512MB for linux and would like to access the rest 512MB directly from an application that runs on linux.

What is the suggested means to achieve this on 2.6.x?

regards,
Prab
 
Old 02-19-2011, 01:22 PM   #2
KaKaj
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Registered: Dec 2010
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An application run on linux, is under control of the linux. Your question looks like a paradox

You don't need to bypass linux to set limits, which I think only can be achieved by special designed hardware. /etc/security/limits.conf and maybe other config files can set such limits.
 
Old 02-25-2011, 12:04 AM   #3
soplin
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Quote:
Originally Posted by prabknow View Post
Hello,
We have a system with 1 GB memory. Out of this, i would like to restrict only 512MB for linux and would like to access the rest 512MB directly from an application that runs on linux.
Prab
http://www.linuxquestions.org/linux/...usage_on_Linux
http://en.wikipedia.org/wiki/Resident_set_size
http://forums13.itrc.hp.com/service/...readId=1307005
http://www.linuxjournal.com/article/6930
http://linux.die.net/man/3/malloc
http://www.linuxquestions.org/questi...-linux-836470/
http://wiki.linuxquestions.org/wiki/Ulimit
http://forums.pcsx2.net/Thread-blog-...Alloc-on-Linux

Last edited by soplin; 02-25-2011 at 12:17 AM.
 
  


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