1 How to deal with bad memory e.g. reported by memtest86+ ?
2 =========================================================
5 Jan-Simon Moeller, dl9pf@gmx.de
9 There are three possibilities I know of:
11 1) Reinsert/swap the memory modules
13 2) Buy new modules (best!) or try to exchange the memory
14 if you have spare-parts
16 3) Use BadRAM or memmap
18 This Howto is about number 3) .
24 BadRAM is the actively developed and available as kernel-patch
25 here: http://rick.vanrein.org/linux/badram/
27 For more details see the BadRAM documentation.
32 memmap is already in the kernel and usable as kernel-parameter at
33 boot-time. Its syntax is slightly strange and you may need to
34 calculate the values by yourself!
36 Syntax to exclude a memory area (see kernel-parameters.txt for details)::
38 memmap=<size>$<address>
40 Example: memtest86+ reported here errors at address 0x18691458, 0x18698424 and
41 some others. All had 0x1869xxxx in common, so I chose a pattern of
42 0x18690000,0xffff0000.
44 With the numbers of the example above::
50 memmap=0x10000$0x18690000