---

yaml --- r: 110513 b: refs/heads/master c: 55dc7db h: refs/heads/master i: 110511: da5a10c v: v3
git-mirror · Oct 9, 2008 · ba19ec7 · ba19ec7
1 parent c05b926
commit ba19ec7
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Showing 3 changed files with 11 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 2bbedcb4c1abac498f18e5770d62ae66ff235ada
+refs/heads/master: 55dc7db70a73a3809a2334063c9b5b0d8ccebdaa
diff --git a/trunk/init/do_mounts.c b/trunk/init/do_mounts.c
@@ -263,6 +263,10 @@ void __init mount_block_root(char *name, int flags)
 		printk("Please append a correct \"root=\" boot option; here are the available partitions:\n");
 
 		printk_all_partitions();
+#ifdef CONFIG_DEBUG_BLOCK_EXT_DEVT
+		printk("DEBUG_BLOCK_EXT_DEVT is enabled, you need to specify "
+		       "explicit textual name for \"root=\" boot option.\n");
+#endif
 		panic("VFS: Unable to mount root fs on %s", b);
 	}
 

diff --git a/trunk/lib/Kconfig.debug b/trunk/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