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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 1d1d53f85ddd..5529fa82700b 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2237,6 +2237,15 @@
The memory region may be marked as e820 type 12 (0xc)
and is NVDIMM or ADR memory.
+ memmap=<size>%<offset>-<oldtype>+<newtype>
+ [KNL,ACPI] Convert memory within the specified region
+ from <oldtype> to <newtype>. If "-<oldtype>" is left
+ out, the whole region will be marked as <newtype>,
+ even if previously unavailable. If "+<newtype>" is left
+ out, matching memory will be removed. Types are
+ specified as e820 types, e.g., 1 = RAM, 2 = reserved,
+ 3 = ACPI, 12 = PRAM.
+
memory_corruption_check=0/1 [X86]
Some BIOSes seem to corrupt the first 64k of
memory when doing things like suspend/resume.