On 01/15/2010 06:06 PM, Yuhong Bao wrote:IIRC Fedora actually planned to offer that and dropped it. There seem to be display issues, I would assume the X stuff would have to match the kernel, although I'm basing that on reports. The only split I ever tried was text only.The big difference isn't between HIGHMEM4G (no PAE) and HIGHMEM64GUnfortunately most desktop/laptop systems nowadays ship with more than 1GB.Luckily, in the case of Atom netbooks that Linus mentioned, most Atom netbooks ship with only 1GB of RAM, partly due to MS's restrictions.However, disabling HIGHMEM will turn off NX which all Atom CPUs have, unless you turn CONFIG_PAE back on.
(PAE), it's between HIGHMEM and !HIGHMEM. That cutoff is ~892 MB for a
stock 32-bit kernel.
Since 32 bits means that any machine with 1 GB more means HIGHMEM, the
number of non-embedded machines that should run 32-bit kernels today is
functionally the null set. Unfortunately Linux distros have not
properly promoted 64-bit kernels for 32-bit distros; although pure 64
bits is better, it would be a *helluva* lot better if people stuck on 32
bits for compatibility reasons had a saner alternative.