[libvirt PATCH] qemu: Ignore missing vm.unprivileged_userfaultfd sysctl

[Jiri Denemark]

Older kernels did not support this sysctl, but did not restrict
userfaultfd in any way so everything worked as if
vm.unprivileged_userfaultfd was set to 1. Thus we can safely ignore
errors when setting the value.

Signed-off-by: Jiri Denemark <jdenemar at redhat.com>
---
 src/qemu/postcopy-migration.sysctl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/qemu/postcopy-migration.sysctl b/src/qemu/postcopy-migration.sysctl
index aa8f015ae0..db3f11e49f 100644
--- a/src/qemu/postcopy-migration.sysctl
+++ b/src/qemu/postcopy-migration.sysctl
@@ -3,4 +3,4 @@
 # privileged processes.
 # It can be safely overridden by a file in /etc/sysctl.d/ in case post-copy
 # migration is not used on the host.
-vm.unprivileged_userfaultfd = 1
+-vm.unprivileged_userfaultfd = 1
-- 
2.35.1