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-rw-r--r--core/modules/run-virt/README2
1 files changed, 2 insertions, 0 deletions
diff --git a/core/modules/run-virt/README b/core/modules/run-virt/README
index 45178bbc..be0a47d1 100644
--- a/core/modules/run-virt/README
+++ b/core/modules/run-virt/README
@@ -157,6 +157,8 @@ Note that this is a floppy, not the cloud, so you're limited to 1.44MB of storag
Hook to set up read or write access to image. Here, only *.inc type hooks make sense, since they're
expected to set either VM_DISKFILE_RO or VM_DISKFILE_RW, depending on desired access.
+You should only ever set one of the two variables, as it is undefined what the individual
+virtualizer plugins will do if both variables are set.
# pre-exec.d/