UBUNTU: SAUCE: kvm: x86: mmu: Recovery of shattered NX large pages

[mirror_ubuntu-bionic-kernel.git] / Documentation / admin-guide / kernel-parameters.txt

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 006b6a21057007ee42f42ee9c3a01cea36d88585..fe7cbc853a008ba368a252cec6c8145984206bf1 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1903,6 +1903,12 @@
                        If the sw workaround is enabled for the host, guests
                        need not enable it for nested guests.
 
+       kvm.nx_huge_pages_recovery_ratio=
+                       [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.
+
        kvm-amd.nested= [KVM,AMD] Allow nested virtualization in KVM/SVM.
                        Default is 1 (enabled)