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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-24 21:22:33 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-09-24 21:22:33 +0100 |
| commit | baea7b946f00a291b166ccae7fcfed6c01530cc6 (patch) | |
| tree | 4aa275fbdbec9c7b9b4629e8bee2bbecd3c6a6af /Documentation/memory.txt | |
| parent | ae19ffbadc1b2100285a5b5b3d0a4e0a11390904 (diff) | |
| parent | 94e0fb086fc5663c38bbc0fe86d698be8314f82f (diff) | |
| download | op-kernel-dev-baea7b946f00a291b166ccae7fcfed6c01530cc6.zip op-kernel-dev-baea7b946f00a291b166ccae7fcfed6c01530cc6.tar.gz | |
Merge branch 'origin' into for-linus
Conflicts:
MAINTAINERS
Diffstat (limited to 'Documentation/memory.txt')
| -rw-r--r-- | Documentation/memory.txt | 31 |
1 files changed, 2 insertions, 29 deletions
diff --git a/Documentation/memory.txt b/Documentation/memory.txt index 2b3dedd..802efe5 100644 --- a/Documentation/memory.txt +++ b/Documentation/memory.txt @@ -1,18 +1,7 @@ There are several classic problems related to memory on Linux systems. - 1) There are some buggy motherboards which cannot properly - deal with the memory above 16MB. Consider exchanging - your motherboard. - - 2) You cannot do DMA on the ISA bus to addresses above - 16M. Most device drivers under Linux allow the use - of bounce buffers which work around this problem. Drivers - that don't use bounce buffers will be unstable with - more than 16M installed. Drivers that use bounce buffers - will be OK, but may have slightly higher overhead. - - 3) There are some motherboards that will not cache above + 1) There are some motherboards that will not cache above a certain quantity of memory. If you have one of these motherboards, your system will be SLOWER, not faster as you add more memory. Consider exchanging your @@ -24,7 +13,7 @@ It can also tell Linux to use less memory than is actually installed. If you use "mem=" on a machine with PCI, consider using "memmap=" to avoid physical address space collisions. -See the documentation of your boot loader (LILO, loadlin, etc.) about +See the documentation of your boot loader (LILO, grub, loadlin, etc.) about how to pass options to the kernel. There are other memory problems which Linux cannot deal with. Random @@ -42,19 +31,3 @@ Try: with the vendor. Consider testing it with memtest86 yourself. * Exchanging your CPU, cache, or motherboard for one that works. - - * Disabling the cache from the BIOS. - - * Try passing the "mem=4M" option to the kernel to limit - Linux to using a very small amount of memory. Use "memmap="-option - together with "mem=" on systems with PCI to avoid physical address - space collisions. - - -Other tricks: - - * Try passing the "no-387" option to the kernel to ignore - a buggy FPU. - - * Try passing the "no-hlt" option to disable the potentially - buggy HLT instruction in your CPU. |
