Documentation/memory.txt: remove some very outdated recommendations

Remove some very outdated recommendations in Documentation/memory.txt

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/Documentation/memory.txt b/Documentation/memory.txt
index 2b3dedd..802efe5 100644 (file)
--- 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.