From: Mark_H_Johnson@Raytheon.com
To: santosh@sony.co.in
Cc: Linux-MM@kvack.org
Subject: Re: Memory partitioning
Date: Tue, 22 Aug 2000 08:18:58 -0500 [thread overview]
Message-ID: <OFD6D15CC0.5EB71010-ON86256943.00482136@hou.us.ray.com> (raw)
Hmm. We've been looking into moving a real time computer emulation [to run
flight software in a simulator] to Linux and have similar problems. Our
solution doesn't involve partitioning the MMU though. Similar to the
MKLinux example below, we're willing to use the part of Linux memory
management where it helps - allocating storage and locking it into memory.
Where we've focused our attention is the handling of page faults & related
traps. We want something like a "secondary interrupt dispatch table" that
is enabled on a per process basis. There's some small overhead to do the
extra IF statement at the start of each interrupt handler, but it gives us
the means of selecting which code we want to run [standard Linux, RT Linux,
or our own]. Is that kind of capability what you are looking for or
something else?
--Mark H Johnson
<mailto:Mark_H_Johnson@raytheon.com>
Santosh
Eraniose To: Linux-MM@kvack.org
<santosh@sony cc: (bcc: Mark H Johnson/RTS/Raytheon/US)
.co.in> Subject: Memory partitioning
08/22/00
05:32 AM
Hi,
Is it possible to partition the MMU such that multiple OS
can run on the same platform.
In all examples I see like MKLinux , the mem mgmt of Linux is mapped to the
underlying Mach kernel.
The other extreme is as in RTAI (Real time App Interface), where the MMU is
handled by linux, but the
scheduling is done by RTAI.
Thanks
Santosh Eraniose
-----------------------------------------------
Member Technical
Sony Software Architecture Lab
Bangalore
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next reply other threads:[~2000-08-22 13:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-08-22 13:18 Mark_H_Johnson [this message]
-- strict thread matches above, loose matches on Subject: below --
2000-08-22 10:32 Santosh Eraniose
2000-09-04 7:51 ` Ralf Baechle
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