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2.4 -> 2.2 differences?

DISCUSSION Robert L. Harris 7 participants 11 messages Jul 25, 2003 – Jul 31, 2003

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#0 lore raw

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

Yes, weathering the lawsuit mess and all is a good plan but I'm still being asked for this information. Does anyone have a link listing what
kind of functionality would be lost, performance impact (p3 and athalon
machines), etc?

Robert

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Robert L. Harris | GPG Key ID: E344DA3B

                                         @ x-hkp://pgp.mit.edu 

DISCLAIMER:
These are MY OPINIONS ALONE. I speak for no-one else.

Diagnosis: witzelsucht

IPv6 = [email protected] http://ipv6.rdlg.net
IPv4 = [email protected] http://www.rdlg.net

#1 lore raw
Quoted 10 lines · Robert L. Harris

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

Yes, weathering the lawsuit mess and all is a good plan but I'm still being asked for this information. Does anyone have a link listing what
kind of functionality would be lost, performance impact (p3 and athalon
machines), etc?

No highmem support,

No journaled filesystems.

No netfilter. Fewer networking features. Period. (ethernet bridging, etc)

Slower SMP

I don't know if it's psycological, but whenever I booted 2.2 on my desktop, it felt slower.

This was a while ago though.

Mike

#2 lore raw
In reply to Robert L. Harris
Quoted 10 lines · Robert L. Harris

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

Yes, weathering the lawsuit mess and all is a good plan but I'm still being asked for this information. Does anyone have a link listing what
kind of functionality would be lost, performance impact (p3 and athalon
machines), etc?

You could start with Joe Pranevich's "Wonderful World of Linux 2.4" at
http://linuxtoday.com/news_story.php3?ltsn=1999-10-03-001-05-NW-LF

There have been a number of improvements and features added since but any 2.2 -> 2.4 features summary should indicate much of what you would loose in a 2.4 -> 2.2 transition.

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		Remember Cernan and Schmitt
#3 lore raw
In reply to Robert L. Harris
Quoted 3 lines · In article <[email protected]> you wrote:

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

it is easier to turn off SMP.

BTW: what will happen if there is some SMP code from IBM in the kernel which is owned by SCO? Isnt it a matter of days to remove that code? Does anybody have to pay for past usage of the code?

Bernd

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#4 lore raw
Quoted 10 lines · Bernd Eckenfels
Quoted 3 lines · In article <[email protected]> you wrote:

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

it is easier to turn off SMP.

BTW: what will happen if there is some SMP code from IBM in the kernel which is owned by SCO? Isnt it a matter of days to remove that code? Does anybody have to pay for past usage of the code?

The core 2.2 SMP code is stuff I wrote. Caldera (aka SCO) even provided me the hardware and asked me to do it. The later table parser code is from Intel.

#5 lore raw

Too bad you don't have anything they gave you or which they took back from you that could be used against them.

Thus spake Alan Cox ([email protected]):

Quoted 17 lines · Bernd Eckenfels
Quoted 10 lines
Quoted 3 lines · In article <[email protected]> you wrote:

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

it is easier to turn off SMP.

BTW: what will happen if there is some SMP code from IBM in the kernel which is owned by SCO? Isnt it a matter of days to remove that code? Does anybody have to pay for past usage of the code?

The core 2.2 SMP code is stuff I wrote. Caldera (aka SCO) even provided me the hardware and asked me to do it. The later table parser code is from Intel.

Quoted 5 lines

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:wq!
---------------------------------------------------------------------------
Robert L. Harris | GPG Key ID: E344DA3B

                                         @ x-hkp://pgp.mit.edu 

DISCLAIMER:
These are MY OPINIONS ALONE. I speak for no-one else.

Diagnosis: witzelsucht

IPv6 = [email protected] http://ipv6.rdlg.net
IPv4 = [email protected] http://www.rdlg.net

#6 lore raw
Quoted 2 lines · Robert L. Harris

Too bad you don't have anything they gave you or which they took back from you that could be used against them.

Its a matter of archived public record since long ago

#7 lore raw

Yeah but likely nothing along the line of correspondence of them offering you the stuff if you give them a copy of your work on SMP which would happen to be GPL'd....

Thus spake Alan Cox ([email protected]):

Quoted 5 lines · Robert L. Harris
Quoted 2 lines

Too bad you don't have anything they gave you or which they took back from you that could be used against them.

Its a matter of archived public record since long ago

:wq!
---------------------------------------------------------------------------
Robert L. Harris | GPG Key ID: E344DA3B

                                         @ x-hkp://pgp.mit.edu 

DISCLAIMER:
These are MY OPINIONS ALONE. I speak for no-one else.

Diagnosis: witzelsucht

IPv6 = [email protected] http://ipv6.rdlg.net
IPv4 = [email protected] http://www.rdlg.net

#8 lore raw
In reply to Alan Cox
Quoted 8 lines · Alan Cox
Quoted 7 lines · Bernd Eckenfels
Quoted 3 lines · In article <[email protected]> you wrote:

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

it is easier to turn off SMP.

Quoted 7 lines
Quoted 3 lines

BTW: what will happen if there is some SMP code from IBM in the kernel which is owned by SCO? Isnt it a matter of days to remove that code? Does anybody have to pay for past usage of the code?

The core 2.2 SMP code is stuff I wrote. Caldera (aka SCO) even provided me the hardware and asked me to do it. The later table parser code is from Intel.

Did you open up the boxes? Perhaps there was some license note attached to the internals (`by using this machine, you declare to give up your first born etc... ')?

Gr{oetje,eeting}s,

Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds

#9 lore raw
In reply to Bernd Eckenfels

Thus spake Bernd Eckenfels ([email protected]):

Quoted 10 lines
Quoted 3 lines · In article <[email protected]> you wrote:

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

it is easier to turn off SMP.

BTW: what will happen if there is some SMP code from IBM in the kernel which is owned by SCO? Isnt it a matter of days to remove that code? Does anybody have to pay for past usage of the code?

But would just turning off SMP shut up the lawyers? They're saying it'd take a full roll back to 2.2.

Having Gartner say not to take the suit seriously isn't helping calm down the lawyers, etc even if there is no proof.

http://www.nwfusion.com/news/2003/0523gartntous2.html

Right now there's just a bunch of rumors and stories of people like M$ paying license fees which argumentably provides a precedent. (tactics of M$ asside, M$ isn't the topic here)

Robert

:wq!
---------------------------------------------------------------------------
Robert L. Harris | GPG Key ID: E344DA3B

                                         @ x-hkp://pgp.mit.edu 

DISCLAIMER:
These are MY OPINIONS ALONE. I speak for no-one else.

Diagnosis: witzelsucht

IPv6 = [email protected] http://ipv6.rdlg.net
IPv4 = [email protected] http://www.rdlg.net

#10 lore raw
In reply to Robert L. Harris
Quoted 10 lines · Robert L. Harris

With all the SCO fun going on I have people asking me what functionality we would loose if we rolled from 2.4.21 kernel to the last known stable 2.2 kernel.

Yes, weathering the lawsuit mess and all is a good plan but I'm still being asked for this information. Does anyone have a link listing what
kind of functionality would be lost, performance impact (p3 and athalon
machines), etc?

The only reason I'm still using 2.2 is that my binary of realserver won't run on 2.4.x.

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