2 Jan-Simon Moeller, dl9pf@gmx.de
5 How to deal with bad memory e.g. reported by memtest86+ ?
6 #########################################################
8 There are three possibilities I know of:
10 1) Reinsert/swap the memory modules
12 2) Buy new modules (best!) or try to exchange the memory
13 if you have spare-parts
15 3) Use BadRAM or memmap
17 This Howto is about number 3) .
22 BadRAM is the actively developed and available as kernel-patch
23 here: http://rick.vanrein.org/linux/badram/
25 For more details see the BadRAM documentation.
30 memmap is already in the kernel and usable as kernel-parameter at
31 boot-time. Its syntax is slightly strange and you may need to
32 calculate the values by yourself!
34 Syntax to exclude a memory area (see kernel-parameters.txt for details):
35 memmap=<size>$<address>
37 Example: memtest86+ reported here errors at address 0x18691458, 0x18698424 and
38 some others. All had 0x1869xxxx in common, so I chose a pattern of
39 0x18690000,0xffff0000.
41 With the numbers of the example above:
44 memmap=0x10000$0x18690000