From d995849fdbb49a193a33b79f56e397be529f50a7 Mon Sep 17 00:00:00 2001
From: rjkm <none>
Date: Fri, 14 Jan 2022 12:54:03 +0100
Subject: [PATCH] add comment about IOMMU

---
 docs/redirect | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/redirect b/docs/redirect
index db5ca9b..ec3337d 100644
--- a/docs/redirect
+++ b/docs/redirect
@@ -28,3 +28,7 @@ devices in any way.
 adapter_alloc=3 is rcommended when using redirect
 The ci device will then show up in the same adapter directory and most
 software will then assume it belongs to the frontend in the same directory.
+
+
+Redirect between cards in different IOMMU groups will not work!
+Disable IOMMU if you have this problem.
\ No newline at end of file