From 6fa23f285fe82cea2a20fcee35a040c664701ac8 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Mon, 21 Sep 2009 17:01:29 -0700 Subject: [PATCH] --- yaml --- r: 164379 b: refs/heads/master c: 3b2b9a875ddcbf9fcd667db9f961a6a163bd083f h: refs/heads/master i: 164377: 0d7e15a1b9296c3b2e61c71982e64532d5d3bf08 164375: a8d14d92e166f742e5b3e2c9231e6306d4a8611f v: v3 --- [refs] | 2 +- trunk/Documentation/memory.txt | 31 ++----------------------------- 2 files changed, 3 insertions(+), 30 deletions(-) diff --git a/[refs] b/[refs] index b49d78256583..3d96b446df71 100644 --- a/[refs] +++ b/[refs] @@ -1,2 +1,2 @@ --- -refs/heads/master: 3701b0332330ca1add3e5d56513ef201ff7efdbb +refs/heads/master: 3b2b9a875ddcbf9fcd667db9f961a6a163bd083f diff --git a/trunk/Documentation/memory.txt b/trunk/Documentation/memory.txt index 2b3dedd39538..802efe58647c 100644 --- a/trunk/Documentation/memory.txt +++ b/trunk/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.