Re: is killing zombies possible w/o a reboot?

From: Bill Davidsen (davidsen_at_tmr.com)
Date: 11/04/04

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    Date:	Thu, 04 Nov 2004 15:10:58 -0500
To: Mitchell Blank Jr <mitch@sfgoth.com>

    Mitchell Blank Jr wrote:
    > Russell Miller wrote:
    >
    >>Couldn't ring 1 be used to make
    >>sure an errant driver doesn't drop the kernel, at least on x86 machines?
    >
    >
    > Not really -- drivers could still do things like mis-program their associated
    > hardware making it do DMA writes all over kernel memory (just as one example)
    >
    > Basically it'd add a lot of complexity (and inefficiency) without adding
    > much real safety.

    It would be nice on x86 to run ring 1 for kernel debugging, getting
    faults at appropriate points. Sorry, I'm an old MULTICS guy, wish
    Honeywell would OS it. 

    -- 
    -bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
  last possible moment - but no longer"  -me
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