From: Jiri Denemark Date: Wed, 9 Feb 2022 10:08:42 +0000 (+0100) Subject: qemu: Ignore missing vm.unprivileged_userfaultfd sysctl X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=558f00397a0d46ad22bf53a22a40ed6fc4fdb5eb;p=libvirt.git qemu: Ignore missing vm.unprivileged_userfaultfd sysctl Older kernels did not support this sysctl, but they 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 Reviewed-by: Ján Tomko --- 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