tor, 2004-04-08 kl. 15:30 skrev Lars E. D. Jensen: > Hej > > Min server har 2 GB ram installeret, men Debian "opdager" kun 1 GB ram. > Bios fortæller, at der er 2 GB ram installeret. > > Hvad kan årsagen være til dette?
Tjek din indstilling af CONFIG_NOHIGHMEM i din kerne. Du finder den under "Processor type and features": │ Linux can use up to 64 Gigabytes of physical memory on x86 systems. │ │ However, the address space of 32-bit x86 processors is only 4 │ │ Gigabytes large. That means that, if you have a large amount of │ │ physical memory, not all of it can be "permanently mapped" by the │ │ kernel. The physical memory that's not permanently mapped is called │ │ "high memory". │ │ │ │ If you are compiling a kernel which will never run on a machine with │ │ more than 960 megabytes of total physical RAM, answer "off" here (defau │ │ choice and suitable for most users). This will result in a "3GB/1GB" │ │ split: 3GB are mapped so that each process sees a 3GB virtual memory │ │ space and the remaining part of the 4GB virtual memory space is used │ │ by the kernel to permanently map as much physical memory as │ │ possible. │ If more than 4 Gigabytes is used then answer "64GB" here. This │ │ selection turns Intel PAE (Physical Address Extension) mode on. │ │ PAE implements 3-level paging on IA32 processors. PAE is fully │ │ supported by Linux, PAE mode is implemented on all recent Intel │ │ processors (Pentium Pro and better). NOTE: If you say "64GB" here, │ │ then the kernel will not boot on CPUs that don't support PAE! │ │ │ │ The actual amount of total physical memory will either be auto │ │ detected or can be forced by using a kernel command line option such │ │ as "mem=256M". (Try "man bootparam" or see the documentation of your │ │ boot loader (grub, lilo or loadlin) about how to pass options to the │ │ kernel at boot time.) │ │ │ │ If unsure, say "off". -- Claus Hindsgaul <[EMAIL PROTECTED]>
