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Re: currency based virtual memory
From: |
Neal H. Walfield |
Subject: |
Re: currency based virtual memory |
Date: |
07 Nov 2002 16:51:03 -0500 |
User-agent: |
Gnus/5.0808 (Gnus v5.8.8) Emacs/21.2 |
> > Well, it should not swap everything out. But if you really way to,
> > then I imagine you would have to ask someone else to wake you up.
>
> That brings up another issue I wanted to ask about before. What if a
> process doesn't give back RAM to the system when the memory manager
> asks it to? Your slides say that the memory manager can decide to
> revoke all mappings (which is more or less the same thing as killing
> the process, right?).
Almost: the VMM does not know how to kill a process gracefully.
> I find it a little scary that processes that miss a memory-return
> deadline will be killed with no mercy. Will they even get the chance
> to dump core?
The problem is the VMM does not know about the underlying OS
personalities. One approach would be to send a notification to a task
in the OS personality that could handle the situation gracefully. It
could decide to force a core dump or send it to swap or whatever.
> A better alternative might be to swap out the process.
[ snip ]
I just think that the VMM is the wrong place for this. The OS
personality should worry about these things since it is the one
setting the policy anyway.
- Re: currency based virtual memory, (continued)
- Re: currency based virtual memory, Niels Möller, 2002/11/02
- Re: currency based virtual memory, Neal H. Walfield, 2002/11/02
- Re: currency based virtual memory, Sunnanvind Fenderson, 2002/11/04
- Re: currency based virtual memory, Matthew Sackman, 2002/11/07
- Re: currency based virtual memory, Niels Möller, 2002/11/07
- Re: currency based virtual memory, Neal H. Walfield, 2002/11/07
- Re: currency based virtual memory, Matthew Sackman, 2002/11/07
- Re: currency based virtual memory, Neal H. Walfield, 2002/11/07
- Re: currency based virtual memory, Niels Möller, 2002/11/07
- Re: currency based virtual memory,
Neal H. Walfield <=
- Re: currency based virtual memory, Niels Möller, 2002/11/07
- Re: currency based virtual memory, Neal H. Walfield, 2002/11/07