Telling kernel how much RAM to use at boot time?
james at westexe.demon.co.uk
Wed Jul 21 16:34:47 UTC 2004
- - s r b - - wrote:
> I've read that Knoppix has a boot code (RAM=xxx I think) that tells the
> kernel how much RAM is available. Does Fedora have anything like this?
It's a Linux kernel option. From
mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory
Amount of memory to be used when the kernel is not able
to see the whole system memory or for test.
> I have a 512MB DDR333 that has bad memory just over the 400MB mark. I'd be
> happy to be able to run Fedora with this memory by telling it not to try
> to access anything over 400MB.
So mem=400M should work for you. However, the BadRAM patch at
http://rick.vanrein.org/linux/badram/ would be better. This requires
patching and recompiling your kernel, but it allows you to ignore only
the dud memory cells and use all the good ones.
Hope this helps,
E-mail address: james@ | "Microwave oven? Whaddya mean, it's a microwave
westexe.demon.co.uk | oven? I've been watching Channel 4 on the thing
| for two weeks."
More information about the users