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-rw-r--r--Documentation/kernel-parameters.txt13
1 files changed, 11 insertions, 2 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 44427607b7c6..2000977af776 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -610,8 +610,17 @@ and is between 256 and 4096 characters. It is defined in the file
that could hold holes aka. UC entries.
mtrr_gran_size=nn[KMG] [X86]
- used for mtrr cleanup. It is granity of mtrr block.
- Big value could prevent small alignment use up MTRRs.
+ Used for mtrr cleanup. It is granularity of mtrr block.
+ Default is 1.
+ Large value could prevent small alignment from
+ using up MTRRs.
+
+ mtrr_spare_reg_nr=n [X86]
+ Format: <integer>
+ Range: 0,7 : spare reg number
+ Default : 1
+ Used for mtrr cleanup. It is spare mtrr entries number.
+ Set to 2 or more if your graphical card needs more.
disable_mtrr_trim [X86, Intel and AMD only]
By default the kernel will trim any uncacheable