Sujet : Re: Privilege Levels Below User
De : paaronclayton (at) *nospam* gmail.com (Paul A. Clayton)
Groupes : comp.archDate : 14. Jun 2024, 00:09:41
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v4fu7n$2gbrf$1@dont-email.me>
References : 1 2 3 4
User-Agent : Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.0
On 6/8/24 1:37 PM, MitchAlsup1 wrote:
EricP wrote:
Scott Lurndal wrote:
[snip]
What they found that not only do they not need 4 levels,
it was a pointless overhead to have to constantly switch between them.
(There is a pretty high penalty to switching modes, copying in args,
validating args, doing something usually simple, then switching back,
when it is all the OS's code anyway.)
VAX was before common era Hypervisors, do you think VAX could have supported secure mode and hypervisor with their 4 levels ??
But for similar reasons ring 1 and 2 are not used in x86 machines, either. {{NOw, if we could just go back to 1982 and not invent IDTs, and call gates, .....}}
I thought My 66000 had Port Holes that are vaguely similar to
call gates, so rather than "not invent" perhaps invent with better
semantics and a better interface? (Though 1982 might have been too
early to implement such. Better perceiving when to wait for the
technology or understanding to implement something better is
presumably one of the skills acquired by long experience as well
as the related what can be implemented to provide the most
attractive/marketable features without excessively limiting future
developments. Letting a competitor provide a temporarily better
product — or delaying entry into a market expecting a feature —
can sometimes be sensible if one expects to leapfrog with
a better long-term alternative, but "worse is better" has some
truth.)
Date | Sujet | # | | Auteur |
7 Jun 24 | Privilege Levels Below User | 119 | | John Savard |
7 Jun 24 | Re: Privilege Levels Below User | 1 | | MitchAlsup1 |
7 Jun 24 | Re: Privilege Levels Below User | 9 | | MitchAlsup1 |
9 Jun 24 | Re: Privilege Levels Below User | 8 | | John Savard |
10 Jun 24 | Re: Privilege Levels Below User | 7 | | Lawrence D'Oliveiro |
10 Jun 24 | Re: Privilege Levels Below User | 6 | | John Savard |
10 Jun 24 | Re: Privilege Levels Below User | 4 | | MitchAlsup1 |
11 Jun 24 | Re: Privilege Levels Below User | 2 | | John Savard |
11 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
11 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
11 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
8 Jun 24 | Re: Privilege Levels Below User | 4 | | Lawrence D'Oliveiro |
8 Jun 24 | Re: Privilege Levels Below User | 1 | | John Dallman |
8 Jun 24 | Re: Not history, Privilege Levels Below User | 2 | | John Levine |
9 Jun 24 | Re: Not history, Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
8 Jun 24 | Re: Privilege Levels Below User | 66 | | MitchAlsup1 |
9 Jun 24 | Re: Privilege Levels Below User | 14 | | Lawrence D'Oliveiro |
9 Jun 24 | Re: Privilege Levels Below User | 1 | | David Schultz |
10 Jun 24 | Re: Privilege Levels Below User | 11 | | Lawrence D'Oliveiro |
11 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
11 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 9 | | John Levine |
12 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 8 | | Lawrence D'Oliveiro |
12 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 7 | | John Levine |
12 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
12 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 5 | | Lynn Wheeler |
13 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 4 | | Lawrence D'Oliveiro |
13 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 3 | | Lynn Wheeler |
13 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 2 | | Lawrence D'Oliveiro |
13 Jun 24 | Re: time-sharing history, Privilege Levels Below User | 1 | | Lynn Wheeler |
24 Oct 24 | Re: Privilege Levels Below User | 1 | | MitchAlsup1 |
9 Jun 24 | Re: Privilege Levels Below User | 2 | | Anton Ertl |
10 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
10 Jun 24 | Re: Privilege Levels Below User | 8 | | Anton Ertl |
11 Jun 24 | Re: Privilege Levels Below User | 4 | | Lawrence D'Oliveiro |
12 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
12 Jun 24 | Re: Privilege Levels Below User | 2 | | Thomas Koenig |
12 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
11 Jun 24 | Re: Privilege Levels Below User | 3 | | Lawrence D'Oliveiro |
12 Jun 24 | Re: Privilege Levels Below User | 1 | | George Neuner |
12 Jun 24 | Re: Privilege Levels Below User | 1 | | John Dallman |
10 Jun 24 | Re: Privilege Levels Below User | 15 | | Terje Mathisen |
10 Jun 24 | Re: Privilege Levels Below User | 4 | | Michael S |
11 Jun 24 | Re: Privilege Levels Below User | 3 | | Lawrence D'Oliveiro |
11 Jun 24 | Re: Privilege Levels Below User | 2 | | MitchAlsup1 |
12 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
11 Jun 24 | Re: Privilege Levels Below User | 5 | | Lawrence D'Oliveiro |
12 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
13 Jun 24 | Re: Privilege Levels Below User | 3 | | MitchAlsup1 |
13 Jun 24 | Re: Privilege Levels Below User | 2 | | Lawrence D'Oliveiro |
13 Jun 24 | Re: Privilege Levels Below User | 1 | | Michael S |
11 Jun 24 | Re: Privilege Levels Below User | 5 | | Terje Mathisen |
11 Jun 24 | Re: Privilege Levels Below User | 4 | | Michael S |
12 Jun 24 | Re: Privilege Levels Below User | 1 | | Stefan Monnier |
13 Jun 24 | Re: Privilege Levels Below User | 2 | | Lawrence D'Oliveiro |
14 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
14 Jun 24 | Re: Privilege Levels Below User | 26 | | Paul A. Clayton |
14 Jun 24 | Re: Privilege Levels Below User | 25 | | MitchAlsup1 |
14 Jun 24 | Re: Privilege Levels Below User | 4 | | Lawrence D'Oliveiro |
14 Jun 24 | Re: Privilege Levels Below User | 3 | | John Savard |
14 Jun 24 | Re: Privilege Levels Below User | 2 | | Lawrence D'Oliveiro |
15 Jun 24 | Re: Privilege Levels Below User | 1 | | John Dallman |
14 Jun 24 | Re: Privilege Levels Below User | 20 | | John Savard |
15 Jun 24 | Re: Privilege Levels Below User | 19 | | Thomas Koenig |
15 Jun 24 | Re: Privilege Levels Below User | 18 | | Lawrence D'Oliveiro |
15 Jun 24 | Re: Privilege Levels Below User | 3 | | Anton Ertl |
15 Jun 24 | Re: Privilege Levels Below User | 1 | | Thomas Koenig |
16 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
15 Jun 24 | Re: Privilege Levels Below User | 14 | | John Dallman |
16 Jun 24 | Re: Privilege Levels Below User | 12 | | Lawrence D'Oliveiro |
16 Jun 24 | Re: Privilege Levels Below User | 11 | | Michael S |
16 Jun 24 | Re: Privilege Levels Below User | 10 | | Lawrence D'Oliveiro |
16 Jun 24 | Re: Privilege Levels Below User | 9 | | Michael S |
16 Jun 24 | Re: Privilege Levels Below User | 3 | | Thomas Koenig |
16 Jun 24 | Re: Privilege Levels Below User | 2 | | Michael S |
16 Jun 24 | Re: Privilege Levels Below User | 1 | | Terje Mathisen |
16 Jun 24 | Re: Privilege Levels Below User | 5 | | Lawrence D'Oliveiro |
16 Jun 24 | Re: Privilege Levels Below User | 4 | | Michael S |
16 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
16 Jun 24 | Re: Privilege Levels Below User | 2 | | Torbjorn Lindgren |
17 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
16 Jun 24 | Re: Privilege Levels Below User | 1 | | Robert Swindells |
8 Jun 24 | Re: Privilege Levels Below User | 7 | | BGB |
9 Jun 24 | Re: Privilege Levels Below User | 3 | | MitchAlsup1 |
9 Jun 24 | Re: Privilege Levels Below User | 2 | | BGB |
10 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
10 Jun 24 | Re: Privilege Levels Below User | 3 | | Terje Mathisen |
10 Jun 24 | Re: Privilege Levels Below User | 2 | | Anton Ertl |
10 Jun 24 | Re: Privilege Levels Below User | 1 | | BGB |
8 Jun 24 | Re: Privilege Levels Below User | 1 | | Chris M. Thomasson |
9 Jun 24 | Re: Privilege Levels Below User | 2 | | John Savard |
11 Jun 24 | Re: Privilege Levels Below User | 1 | | Lawrence D'Oliveiro |
9 Jun 24 | Re: Privilege Levels Below User | 28 | | John Savard |
9 Jun 24 | Re: Privilege Levels Below User | 25 | | Anton Ertl |
9 Jun 24 | Re: Privilege Levels Below User | 24 | | John Savard |
9 Jun 24 | Re: Privilege Levels Below User | 1 | | MitchAlsup1 |
10 Jun 24 | Re: Privilege Levels Below User | 22 | | Anton Ertl |
10 Jun 24 | Re: Privilege Levels Below User | 1 | | MitchAlsup1 |
11 Jun 24 | Re: Privilege Levels Below User | 20 | | John Savard |
11 Jun 24 | Re: Privilege Levels Below User | 14 | | MitchAlsup1 |
11 Jun 24 | Re: Privilege Levels Below User | 3 | | MitchAlsup1 |
11 Jun 24 | Re: Privilege Levels Below User | 2 | | John Savard |
11 Jun 24 | Re: Privilege Levels Below User | 10 | | John Savard |
11 Jun 24 | Re: Privilege Levels Below User | 5 | | Niklas Holsti |
9 Jun 24 | Re: Privilege Levels Below User | 2 | | MitchAlsup1 |