1 files changed, 11 insertions, 3 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 27e0488d54d2..a0c5c5f4fce6 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -741,10 +741,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         See Documentation/block/cfq-iosched.txt and
                         Documentation/block/deadline-iosched.txt for details.
 
-        elfcorehdr=     [IA-64,PPC,SH,X86]
+        elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
                         Specifies physical address of start of kernel core
-                        image elf header. Generally kexec loader will
-                        pass this option to capture kernel.
+                        image elf header and optionally the size. Generally
+                        kexec loader will pass this option to capture kernel.
                         See Documentation/kdump/kdump.txt for details.
 
         enable_mtrr_cleanup [X86]
@@ -973,6 +973,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         ignore_loglevel [KNL]
                         Ignore loglevel setting - this will print /all/
                         kernel messages to the console. Useful for debugging.
+                        We also add it as printk module parameter, so users
+                        could change it dynamically, usually by
+                        /sys/module/printk/parameters/ignore_loglevel.
 
         ihash_entries=  [KNL]
                         Set number of hash buckets for inode cache.
@@ -1666,6 +1669,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         debugging driver suspend/resume hooks).  This may
                         not work reliably with all consoles, but is known
                         to work with serial and VGA consoles.
+                        To facilitate more flexible debugging, we also add
+                        console_suspend, a printk module parameter to control
+                        it. Users could use console_suspend (usually
+                        /sys/module/printk/parameters/console_suspend) to
+                        turn on/off it dynamically.
 
         noaliencache    [MM, NUMA, SLAB] Disables the allocation of alien
                         caches in the slab allocator.  Saves per-node memory,