On 07/07/07 04:45:57PM -0400, Roberto C. Sánchez wrote: > On Sat, Jul 07, 2007 at 04:40:00PM -0400, Jim Crilly wrote: > > > > For 32-bit systems only if the kernel is compiled with CONFIG_HIGHMEM64G > > enabled so you need one of the "bigmem" kernels. And the BIOS on the machine > > has to support remapping the lost memory above the 4G mark, if it won't do > > that for you there's nothing you can do to get access to that memory. > > > The stock Debian kernels are configured like this: > > CONFIG_HIGHMEM4G=y > # CONFIG_HIGHMEM64G is not set > CONFIG_HIGHMEM=y > > So, if you have a machine with 4-64 GB RAM, then a custom kernel is in > order. Of course, as far as the BIOS goes, if the machine supports more > than 4 GB RAM, then the BIOS should as well. After all, why would > someone manufacture a machine that can handle more than 4 GB RAM and > then put in a BIOS that cannot? >
No, even with just 4G you need CONFIG_HIGHMEM64G because to access the memory from ~3.5G-4G you need to remap it above the 4G mark since those addresses were "stolen" by the various hardware components in your system so you need a kernel able to address >4G. > Regards, > > -Roberto Jim. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
