1 files changed, 6 insertions, 0 deletions

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 4378d5e923ca..c556896abe57 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -638,6 +638,12 @@ config DEBUG_BLOCK_EXT_DEVT
           userland code paths which assume predetermined contiguous
           device number allocation.
 
+          Note that turning on this debug option shuffles all the
+          device numbers for all IDE and SCSI devices including libata
+          ones, so root partition specified using device number
+          directly (via rdev or root=MAJ:MIN) won't work anymore.
+          Textual device names (root=/dev/sdXn) will continue to work.
+
           Say N if you are unsure.
 
 config LKDTM