[RFC PATCH 2/2] dracut.cmdline.7.asc: update document for rd.memdebug=4

[Xunlei Pang <xlpang-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

Signed-off-by: Xunlei Pang <xlpang-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
 dracut.cmdline.7.asc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/dracut.cmdline.7.asc b/dracut.cmdline.7.asc
index 0009ff2..70d8776 100644
--- a/dracut.cmdline.7.asc
+++ b/dracut.cmdline.7.asc
@@ -187,8 +187,8 @@ It should be attached to any report about dracut problems.
     _/run/initramfs/init.log_.
     If "quiet" is set, it also logs to the console.
 
-**rd.memdebug=[0-3]**::
-    Print memory usage info at various points, set the verbose level from 0 to 3.
+**rd.memdebug=[0-4]**::
+    Print memory usage info at various points, set the verbose level from 0 to 4.
 +    
     Higher level means more debugging output:
 +
@@ -197,6 +197,7 @@ It should be attached to any report about dracut problems.
     1 - partial /proc/meminfo
     2 - /proc/meminfo
     3 - /proc/meminfo + /proc/slabinfo
+    4 - to find out kernel modules consuming large memory during loading
 ----
 
 **rd.break**::
-- 
1.8.3.1