By: S. Rao (sonny.delete@this.burdell.org), May 13, 2007 2:00 pm
Room: Moderated Discussions
Tzvetan Mikov (tzvetanmi@yahoo.com) on 5/13/07 wrote:
---------------------------
>Linus Torvalds on 5/13/07 wrote:
>---------------------------
>>[...]So no, PAE does not mean that you can use more than
>>4GB of RAM. Even before PAE, the practical limit was around
>>1GB, and PAE didn't move that post a fraction of an inch!
>
>Can you please elaborate on the practical 1 GB limit a little further ?
>
>(Lets leave PAE aside - I think you are being too harsh on the hw designers; I
>doubt that any engineer ever thought PAE was anything more than a temporary hack,
>as was HIMEM actually, but it was probably much easier/cheaper than designing a
>64-bit CPU. What marketing did with that is another story ...)
Well, IMHO, Intel simply didn't want to release a
64bit extension to x86 because they wanted to maintain
segmentation between IA64 and x86... so PAE was a
handy kludge they could point to for the growing fraction
of users with larger memory needs.
>Do you mean that it is absolutely impossible for a 32-bit OS to efficiently use
>RAM > 1 GB, or that it complicates the kernel compared to a hypothetical scenario
>with the same amount of RAM and 64-bits ?
Well, I think he's trying to say after that you have to
start making serious performance tradeoffs...(I should
probably just shut up and let him answer)
---------------------------
>Linus Torvalds on 5/13/07 wrote:
>---------------------------
>>[...]So no, PAE does not mean that you can use more than
>>4GB of RAM. Even before PAE, the practical limit was around
>>1GB, and PAE didn't move that post a fraction of an inch!
>
>Can you please elaborate on the practical 1 GB limit a little further ?
>
>(Lets leave PAE aside - I think you are being too harsh on the hw designers; I
>doubt that any engineer ever thought PAE was anything more than a temporary hack,
>as was HIMEM actually, but it was probably much easier/cheaper than designing a
>64-bit CPU. What marketing did with that is another story ...)
Well, IMHO, Intel simply didn't want to release a
64bit extension to x86 because they wanted to maintain
segmentation between IA64 and x86... so PAE was a
handy kludge they could point to for the growing fraction
of users with larger memory needs.
>Do you mean that it is absolutely impossible for a 32-bit OS to efficiently use
>RAM > 1 GB, or that it complicates the kernel compared to a hypothetical scenario
>with the same amount of RAM and 64-bits ?
Well, I think he's trying to say after that you have to
start making serious performance tradeoffs...(I should
probably just shut up and let him answer)
Topic | Posted By | Date |
---|---|---|
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Rock/Tukwila rumors | Dean Kent | 2007/05/05 02:35 PM |
K8 vs Win64 timeline | anonymous | 2007/05/05 05:19 PM |
Yes, I misremembered... | Dean Kent | 2007/05/05 09:03 PM |
Rock | Daniel Bizó | 2007/05/06 01:34 AM |
Rock | Dean Kent | 2007/05/06 06:11 AM |
Rock/Tukwila rumors | Joe | 2007/05/06 10:24 AM |
Rock/Tukwila rumors | Dean Kent | 2007/05/06 10:49 AM |
Rock/Tukwila rumors | Linus Torvalds | 2007/05/06 11:09 AM |
Rock/Tukwila rumors | anon | 2007/05/07 12:32 AM |
Rock/Tukwila rumors | Rakesh Malik | 2007/05/07 08:36 AM |
Rock/Tukwila rumors | Michael S | 2007/05/07 09:06 AM |
Rock/Tukwila rumors | anon | 2007/05/07 08:48 PM |
Rock/Tukwila rumors | Rakesh Malik | 2007/05/08 05:45 AM |
Rock/Tukwila rumors | anon | 2007/05/08 04:30 PM |
Wow. (nt) | Brannon | 2007/05/08 05:16 PM |
Rock/Tukwila rumors | rwessel | 2007/05/08 08:48 PM |
Rock/Tukwila rumors | JS | 2007/05/08 09:07 PM |
Rock/Tukwila rumors | JS | 2007/05/09 05:44 AM |
Rock/Tukwila rumors | Rakesh Malik | 2007/05/09 04:35 AM |
Much ado about x | Michael S | 2007/05/09 08:39 AM |
Call it x86-64 | Linus Torvalds | 2007/05/09 09:27 AM |
(i)AMD64 | Michael S | 2007/05/09 11:16 AM |
(i)AMD64 | Linus Torvalds | 2007/05/09 11:29 AM |
(i)AMD64 | Groo | 2007/05/09 03:45 PM |
TIFNAA | anonymous | 2007/05/09 04:49 PM |
Inspired by FYR Macedonia? (NT) | Michael S | 2007/05/09 10:21 PM |
More likely... | rwessel | 2007/05/09 11:39 PM |
TIFNAA | Gabriele Svelto | 2007/05/09 10:57 PM |
(i)AMD64 | James | 2007/05/10 01:27 AM |
i86 | Dean Kent | 2007/05/09 11:30 AM |
(i)AMD64 | Max | 2007/05/09 12:28 PM |
wide86? long86? | hobold | 2007/05/10 04:05 AM |
x87 perhaps, it is one more. :) (NT) | Groo | 2007/05/10 04:50 AM |
x86+ | Dean Kent | 2007/05/10 07:44 AM |
Does it really matter? | Doug Siebert | 2007/05/10 08:10 AM |
let's stay with x86-64 for now, please | Marcin Niewiadomski | 2007/05/10 10:50 AM |
let's stay with x86-64 for now, please | Dean Kent | 2007/05/11 05:11 AM |
let's stay with x86-64 for now, please | rwessel | 2007/05/11 01:46 PM |
let's stay with x86-64 for now, please | Dean Kent | 2007/05/11 05:03 PM |
let's stay with x86-64 for now, please | Michael S | 2007/05/12 09:49 AM |
let's stay with x86-64 for now, please | Dean Kent | 2007/05/12 12:05 PM |
let's stay with x86-64 for now, please | Michael S | 2007/05/12 12:25 PM |
let's stay with x86-64 for now, please | Dean Kent | 2007/05/12 02:39 PM |
let's stay with x86-64 for now, please | JasonB | 2007/05/13 06:43 AM |
client consolidation | Michael S | 2007/05/13 07:37 AM |
let's stay with x86-64 for now, please | Tzvetan Mikov | 2007/05/13 02:44 PM |
let's stay with x86-64 for now, please | rwessel | 2007/05/14 01:42 PM |
What's your point? | Doug Siebert | 2007/05/11 01:56 PM |
What's your point? | Linus Torvalds | 2007/05/11 03:15 PM |
What's your point? | Doug Siebert | 2007/05/13 02:11 PM |
What's your point? | Dean Kent | 2007/05/13 06:04 PM |
What's your point? | JasonB | 2007/05/14 01:06 AM |
What's your point? | Dean Kent | 2007/05/14 06:20 AM |
What's your point? | JasonB | 2007/05/14 03:35 PM |
What's your point? | JasonB | 2007/05/14 06:35 PM |
What's your point? | Dean Kent | 2007/05/14 07:12 PM |
What's your point? | Dean Kent | 2007/05/11 05:06 PM |
What's your point? | Stephen H | 2007/05/13 12:55 AM |
Why didn't MS take advantage of PAE? | David W. Hess | 2007/05/13 07:37 AM |
PAE sucks (Why didn't MS take advantage of PAE?) | Linus Torvalds | 2007/05/13 09:20 AM |
PAE sucks (Why didn't MS take advantage of PAE?) | Dean Kent | 2007/05/13 09:49 AM |
PAE sucks (Why didn't MS take advantage of PAE?) | David W. Hess | 2007/05/13 11:37 AM |
> 1 GB RAM on a 32-bit system | Tzvetan Mikov | 2007/05/13 12:44 PM |
> 1 GB RAM on a 32-bit system | S. Rao | 2007/05/13 02:00 PM |
> 1 GB RAM on a 32-bit system | Tzvetan Mikov | 2007/05/13 04:32 PM |
> 1 GB RAM on a 32-bit system | S. Rao | 2007/05/13 11:19 PM |
> 1 GB RAM on a 32-bit system | Linus Torvalds | 2007/05/13 02:46 PM |
> 1 GB RAM on a 32-bit system | Tzvetan Mikov | 2007/05/13 04:23 PM |
> 1 GB RAM on a 32-bit system | JasonB | 2007/05/13 05:37 PM |
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Windows manages memory differently | JasonB | 2007/05/14 12:50 AM |
Windows manages memory differently | Tzvetan Mikov | 2007/05/14 07:56 AM |
Windows manages memory differently | rwessel | 2007/05/14 02:40 PM |
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Windows manages memory differently | rwessel | 2007/05/14 03:51 PM |
Windows manages memory differently | Tzvetan Mikov | 2007/05/14 04:40 PM |
Windows manages memory differently | rwessel | 2007/05/14 05:09 PM |
Windows manages memory differently | Howard Chu | 2007/05/14 10:17 AM |
Windows manages memory differently | Jukka Larja | 2007/05/14 10:30 AM |
Windows manages memory differently | Tzvetan Mikov | 2007/05/14 12:54 PM |
Windows manages memory differently | Howard Chu | 2007/05/15 02:35 AM |
Windows manages memory differently | Groo | 2007/05/15 06:34 AM |
Anyone know what OS X (10.4, Intel, desktop) does? | Matt Sayler | 2007/05/15 05:23 AM |
Anyone know what OS X (10.4, Intel, desktop) does? | Wes Felter | 2007/05/15 07:37 AM |
Anyone know what OS X (10.4, Intel, desktop) does? | Anonymous | 2007/05/15 09:49 AM |
Anyone know what OS X (10.4, Intel, desktop) does? | anon2 | 2007/05/15 06:13 PM |
PAE sucks (Why didn't MS take advantage of PAE?) | Paul | 2007/05/13 02:40 PM |
PAE sucks (Why didn't MS take advantage of PAE?) | Peter Arremann | 2007/05/13 04:38 PM |
PAE sucks (Why didn't MS take advantage of PAE?) | Henrik S | 2007/05/14 02:31 AM |
The fragility of your argument | slacker | 2007/05/13 02:56 PM |
The fragility of your argument | nick | 2007/05/13 04:42 PM |
The fragility of your argument | Howard Chu | 2007/05/14 01:52 AM |
The fragility of your argument | Dean Kent | 2007/05/14 08:19 AM |
The fragility of your argument | anon2 | 2007/05/14 07:26 AM |
The fragility of your argument | Tzvetan Mikov | 2007/05/14 08:01 AM |
The fragility of your argument | Dean Kent | 2007/05/14 08:16 AM |
The fragility of your argument | Linus Torvalds | 2007/05/14 10:57 AM |
The fragility of your argument | JasonB | 2007/05/14 03:48 PM |
The fragility of your argument | Dean Kent | 2007/05/14 06:36 PM |
The fragility of your argument | Ricardo B | 2007/05/16 01:40 AM |
The fragility of your argument | Dean Kent | 2007/05/16 02:32 AM |
The fragility of your argument | Ricardo B | 2007/05/16 05:41 AM |
PS | Ricardo B | 2007/05/16 05:50 AM |
The fragility of your argument | Dean Kent | 2007/05/16 08:07 AM |
Modern web browsing | S. Rao | 2007/05/16 08:16 AM |
Aha! | Dean Kent | 2007/05/16 08:27 AM |
Aha! | Dean Kent | 2007/05/16 08:32 AM |
Aha! | S. Rao | 2007/05/16 09:34 AM |
The fragility of your argument | Ricardo B | 2007/05/16 09:00 AM |
The fragility of your argument | Vincent Diepeveen | 2007/05/16 09:10 AM |
The fragility of your argument | Paul | 2007/05/16 02:01 PM |
The fragility of your argument | Vincent Diepeveen | 2007/05/17 02:05 AM |
The fragility of your argument | anon2 | 2007/05/15 12:35 AM |
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What's your point? | Michael S | 2007/05/13 07:55 AM |
What's your point? | anonymous | 2007/05/13 10:08 AM |
What's your point? | Michael S | 2007/05/13 10:31 AM |
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Rock/Tukwila rumors | IntelUser2000 | 2007/05/06 01:27 PM |
Rock/Tukwila rumors | m | 2007/05/13 07:05 AM |
Rock/Tukwila rumors | mas | 2007/05/15 08:40 AM |