On Thu, 2004-06-24 at 16:36, Russ Johns wrote: > On Wed, 2004-06-23 at 21:25 -0500, Tom 'spot' Callaway wrote: > >On a single CPU machine? Quite unlikely. If you had that much memory, it > >would almost definitely be on an SMP machine, so, you would use the > >hugemem kernel if you wanted to use 4/4, and SMP if not. > > Well just call me unusual. we have a CFD app that we use for short calcs > (~10-20 minutes) on a 3.2GHz P4 (single), that because of changes in the > mesh we are looking to need 3.2-3.5 GB to complete. Can Hugemem support > non-SMP boards or do we need to custom compile a kernel with the > CONFIG_X86_4G option? hugemem kernel can run on most UP boards. There are some boards that have bioses that throw a fit with a SMP kernel due to broken/invalid/weird tables. Most of the time when that happens passing "noapic" to the kernel commandline works around this. Btw this mostly happens with "consumer grade" hardware with short product lifecycles, most of the time the more expensive machines are ok, eg the better the machine the less likely it'll break.
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