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| author | Ingo Molnar <mingo@elte.hu> | 2009-09-24 12:59:11 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-09-24 12:59:18 +0200 |
| commit | d2ff6de537c61a0f05731c6679f3e1abc2d95e68 (patch) | |
| tree | 821aa38121f57a9d5419388ef10ea6f3aa445d4d /Documentation/memory.txt | |
| parent | e23a8b6a8f319c0f08b6ccef2dccbb37e7603dc2 (diff) | |
| parent | a724eada8c2a7b62463b73ccf73fd0bb6e928aeb (diff) | |
| download | kernel-crypto-d2ff6de537c61a0f05731c6679f3e1abc2d95e68.tar.gz kernel-crypto-d2ff6de537c61a0f05731c6679f3e1abc2d95e68.tar.xz kernel-crypto-d2ff6de537c61a0f05731c6679f3e1abc2d95e68.zip | |
Merge branch 'linus' into x86/urgent
Merge reason: Queueing up dependent early-printk fix.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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 2b3dedd3953..802efe58647 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. |