SlackwareThis Forum is for the discussion of Slackware Linux.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
Just as a guess, this is going to be an AMD64 system. Take a look in bios for something called "memory hole" and play with that setting. Typically, if you set that to use a hardware mapped memory hole the problem should go away.
Very often this setting will be found somewhere under the northbridge settings of the bios.
So that you know, the reason that this is happening is that x86 architecture pushes the PCI Option ROMs into the space just below the 4gb point in memory. So, when you actually have enough memory to reach the 4gb point, you lose some of that memory because it is being taken up by ROMs instead. Some bios's have the capability to remap the RAM above this point so that you can actually use it.
just setuped new server and i see that availeble RAM is only 3.6GB instead of 4GB??
any idea why?
I had just the same few days ago.
While BIOS POST reported 4 gigs available the kernel uses only 3,5 gigs (just like 4096 - 512 is 3584)
I even thought it's broken memory .
The problem solved after I've enabled support for 64G of memory in the kernel. All 4G were there.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.