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-   -   32 bit kernel on 64 bit AMD machine (http://www.linuxquestions.org/questions/linux-software-2/32-bit-kernel-on-64-bit-amd-machine-237296/)

dipsae 09-30-2004 09:29 PM

32 bit kernel on 64 bit AMD machine
 
I have a AMD64 bit machine..Was wondering whether it was possible to boot as 32 bit kernel on the same machine??
Thanks

Tinkster 09-30-2004 10:11 PM

Hi, and welcome to LQ!

Do you mean whether the CPU will process 32bit
intel opcodes or do you want to know whether it
can run two kernels in parallel? :)


Cheers,
Tink

Space_Balls 10-01-2004 12:10 AM

I believe he just wants to know if he can run a 32bit kernel on his A64.
Yes, of course!
Otherwise, your 32Bit Win wouldn't work either.
A64s are downwards compatible with Ix86 programs/Operating Systems

dipsae 10-01-2004 01:14 AM

Exactly as space_balls said..However I want to know if there is someway in which I can just have a 32 bit kernel and whenever i want can I switch back to 64 bit..
Something like a switch between 32 bit and 64 bit ..
Thanks for your replies.

asdlfjksa 10-01-2004 09:01 AM

I, too, have a laptop with a 64-bit processor (Compaq R3240US with AMD64 processor). Wifi is vital to me, and I'm told ndiswrapper (necessary for wifi to work with linux) won't work in 64-bit mode. Thus, I'm entertaining the thought of installing 32-bit linux instead of the 64-bit, at least until ndiswrapper (or something similar) can manage 64-bit mode.

My questions are:

1. Exactly what will I be sacrificing by using 32-bit linux vs. 64-bit on this machine?
2. How difficult would it be to upgrade to 64-bit later on?

-- Sky

crashmeister 10-01-2004 11:03 AM

You might sacrifice some performance on some apps depending on if they are written to take advantage of 64 bit or not (see http://www.anandtech.com/linux/showdoc.aspx?i=2213).

Upgrading is with most distros a pain anyway.Going from 32 to 64 bit is just about impossible without a reinstall.


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