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-rw-r--r--Documentation/admin-guide/kernel-parameters.txt9
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 91ba391f9b32..f780844c8390 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -2353,7 +2353,14 @@
[KVM] Controls how many 4KiB pages are periodically zapped
back to huge pages. 0 disables the recovery, otherwise if
the value is N KVM will zap 1/Nth of the 4KiB pages every
- minute. The default is 60.
+ period (see below). The default is 60.
+
+ kvm.nx_huge_pages_recovery_period_ms=
+ [KVM] Controls the time period at which KVM zaps 4KiB pages
+ back to huge pages. If the value is a non-zero N, KVM will
+ zap a portion (see ratio above) of the pages every N msecs.
+ If the value is 0 (the default), KVM will pick a period based
+ on the ratio, such that a page is zapped after 1 hour on average.
kvm-amd.nested= [KVM,AMD] Allow nested virtualization in KVM/SVM.
Default is 1 (enabled)