Re: memory protection in linux kernels

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From	Rainer Weikusat <rweikusat@mssgmbh.com>
Newsgroups	comp.unix.programmer, comp.os.linux.embedded
Subject	Re: memory protection in linux kernels
Date	Thu, 18 Oct 2012 17:56:23 +0100
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"Mark" <mark_cruzNOTFORSPAM@hotmail.com> writes:

[...]

> Also, do I have to enable CONFIG_MAGIC_SYSRQ  except CONFIG_KGDB and 
> CONFIG_DEBUG_INFO (CONFIG_FRAME_POINTER is also recommended) ?

'magic sysreq' is mainly useful when you have some kind of
'interactive console connection' to a computer/ device and it is
necessary to send some kind of 'emergency command' to it after other
ways to interact with the system have ceased to function, eg, try
to write all dirty pages to disk, mount filesystems read-only and do a
'hard' reboot (without a proper shutdown procedure). For embedded,
that's likely not very useful. CONFIG_FRAME_POINTER is very likely a
good idea since this means that the subroutine activation records on
the call stack can be inspected without interpreting the actually
executed machine code.

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memory protection in linux kernels "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2012-10-17 17:32 -0400
  Re: memory protection in linux kernels scott@slp53.sl.home (Scott Lurndal) - 2012-10-18 13:53 +0000
    Re: memory protection in linux kernels "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2012-10-18 11:57 -0400
      Re: memory protection in linux kernels scott@slp53.sl.home (Scott Lurndal) - 2012-10-18 16:24 +0000
        Re: memory protection in linux kernels "Mark" <mark_cruzNOTFORSPAM@hotmail.com> - 2012-10-19 18:08 -0400
          Re: memory protection in linux kernels Ian Collins <ian-news@hotmail.com> - 2012-10-20 12:29 +1300
          Re: memory protection in linux kernels scott@slp53.sl.home (Scott Lurndal) - 2012-10-20 19:49 +0000
      Re: memory protection in linux kernels Rainer Weikusat <rweikusat@mssgmbh.com> - 2012-10-18 17:56 +0100

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