Download your favorite Linux distribution at LQ ISO.
Go Back > Forums > Linux Forums > Linux - Hardware
User Name
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?


  Search this Thread
Old 11-09-2007, 01:44 PM   #1
Registered: Jan 2005
Location: USA
Distribution: Red Hat, CentOS, Fedora, Suse
Posts: 54

Rep: Reputation: 15
Smile 64 bit processor, high mem?


This is an easy question...I really just need verification. 64bit processors do not have a highmem issue correct? I know that 32bit processors can only see up to 4Gb of memory without the highmem option in the kernel however 64bit processors have no highmem issues right? Thanks.

Old 11-09-2007, 02:38 PM   #2
Registered: Feb 2007
Location: Colorado
Distribution: FC6, FC7 x86_64
Posts: 218

Rep: Reputation: 30

Old 11-09-2007, 02:39 PM   #3
Senior Member
Registered: Mar 2003
Location: Nova Scotia, Canada
Distribution: Debian AMD64
Posts: 3,997

Rep: Reputation: 194Reputation: 194
Exactly there is not the memory mapping issue that is present with a 32bit install but this means you have to install a 64bit distribution not the 32bit flavour if you go with 32bit then you still have the same limitation even if you have a 64bit processor in the machine because it is not using 64bit code.

Edit: I should also mention that sometimes like with my board you need to enable the 64bit memory mode in the BIOS to have it work correctly and see the whole 4gb or higher amounts.

Last edited by HappyTux; 11-09-2007 at 02:46 PM.
Old 11-09-2007, 03:11 PM   #4
Registered: Jan 2005
Location: USA
Distribution: Red Hat, CentOS, Fedora, Suse
Posts: 54

Original Poster
Rep: Reputation: 15
Thanks kromberg and Happy Tux. The distro is a 64 bit distro. I was 99% sure there wasn't a highmem issue and you both confirmed it. Thanks.


PS - I will check the BIOS. Thanks for the tip.



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Load Avg High/Phys Mem High teamh Debian 2 12-26-2006 05:03 PM
32 bit apps on 64 bit processor khaleel5000 General 12 04-19-2006 07:55 AM
is high mem support in a 2.6 kernel advised against for 1GB of memory? hedpe Linux - General 2 09-06-2005 09:35 AM
High Mem load suse9.2 + kde, and firefox freezes sometimes mephesto Linux - General 1 03-25-2005 05:08 AM
High Mem Usage miketheninja Linux - General 2 11-05-2003 04:26 PM > Forums > Linux Forums > Linux - Hardware

All times are GMT -5. The time now is 06:07 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Open Source Consulting | Domain Registration