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Re: Questions about copy-on-write
From: |
Sam Mason |
Subject: |
Re: Questions about copy-on-write |
Date: |
Wed, 27 Oct 2004 21:33:09 +0100 |
User-agent: |
Mutt/1.5.6i |
Neal H. Walfield wrote:
>physmem holds mappings
>between virtual frame (per-task handles for physical memory blocks)
>and physical frames.
Is this where most of the memory protections stem from? Tasks can't
ask for arbitrary pages of memory but they can ask physmem for a new
(otherwise unused) page of memory or they can ask for a specific page
of memory out of a container.
If that's true then I think my confusion was coming from a belief that
this mechanism was in L4 iself, rather then physmem.
I think the next challenge for me is to figure out how a task can
revoke a mapping it gave to another task. I guess I'll have to give
the L4 a bit of a read. . .
Thanks,
Sam
- Re: some other memory considerations., (continued)
- Re: some other memory considerations., Marcus Brinkmann, 2004/10/26
- Questions about copy-on-write, Sam Mason, 2004/10/27
- Re: Questions about copy-on-write, Neal H. Walfield, 2004/10/27
- Re: Questions about copy-on-write, Sam Mason, 2004/10/27
- Re: Questions about copy-on-write, Neal H. Walfield, 2004/10/27
- Re: Questions about copy-on-write, Marcus Brinkmann, 2004/10/27
- Re: Questions about copy-on-write, Sam Mason, 2004/10/27
- Re: Questions about copy-on-write, Bas Wijnen, 2004/10/27
- Re: Questions about copy-on-write, Sam Mason, 2004/10/27
- Re: Questions about copy-on-write, Neal H. Walfield, 2004/10/27
- Re: Questions about copy-on-write,
Sam Mason <=
- Re: Questions about copy-on-write, Neal H. Walfield, 2004/10/27
- Re: Questions about copy-on-write, Sam Mason, 2004/10/27
- Re: Questions about copy-on-write, Bas Wijnen, 2004/10/28
- Re: Questions about copy-on-write, Bas Wijnen, 2004/10/27
- Re: Questions about copy-on-write, Marcus Brinkmann, 2004/10/27
- Re: Questions about copy-on-write, Rian Hunter, 2004/10/27
- Re: Questions about copy-on-write, Sam Mason, 2004/10/27
- Re: Questions about copy-on-write, Marcus Brinkmann, 2004/10/27
- Re: Questions about copy-on-write, Marcus Brinkmann, 2004/10/27
- Re: Questions about copy-on-write, Marcus Brinkmann, 2004/10/27