diff --git a/README.adoc b/README.adoc
index 208ff41..82dbad5 100644
--- a/README.adoc
+++ b/README.adoc
@@ -6838,7 +6838,9 @@ du -hsx out/arm-gem5/buildroot/target/
 
 https://stackoverflow.com/questions/49211241/is-there-a-way-to-automatically-detect-the-minimum-required-br2-target-rootfs-ex
 
-One way to overcome this problem is to mount benchmarks from host instead of adding them to the root filesystem, e.g. with: <<9p>>
+libguestfs is very promising link:https://serverfault.com/questions/246835/convert-directory-to-qemu-kvm-virtual-disk-image/916697#916697[], in particular link:http://libguestfs.org/guestfish.1.html#vfs-minimum-size[`vfs-minimum-size`].
+
+One way to overcome this problem is to mount benchmarks from host instead of adding them to the root filesystem, e.g. with: <<9p>>.
 
 [[rpath]]
 === Buildroot rebuild is slow when the root filesystem is large