HID: tiny patch to remove a kmalloc cast

[sfrench/cifs-2.6.git] / Documentation / oops-tracing.txt

diff --git a/Documentation/oops-tracing.txt b/Documentation/oops-tracing.txt
index c563842ed8057e1ee960ff0faa75d87c6b797a56..2503404ae5c26bce481d56daecb008588e86102e 100644 (file)
--- a/Documentation/oops-tracing.txt
+++ b/Documentation/oops-tracing.txt
@@ -30,17 +30,20 @@ the disk is not available then you have three options :-
 
 (1) Hand copy the text from the screen and type it in after the machine
     has restarted.  Messy but it is the only option if you have not
 
 (1) Hand copy the text from the screen and type it in after the machine
     has restarted.  Messy but it is the only option if you have not

-    planned for a crash.
+    planned for a crash. Alternatively, you can take a picture of
+    the screen with a digital camera - not nice, but better than
+    nothing.  If the messages scroll off the top of the console, you
+    may find that booting with a higher resolution (eg, vga=791)
+    will allow you to read more of the text. (Caveat: This needs vesafb,
+    so won't help for 'early' oopses)

 
 (2) Boot with a serial console (see Documentation/serial-console.txt),
     run a null modem to a second machine and capture the output there
     using your favourite communication program.  Minicom works well.
 
 
 (2) Boot with a serial console (see Documentation/serial-console.txt),
     run a null modem to a second machine and capture the output there
     using your favourite communication program.  Minicom works well.
 

-(3) Patch the kernel with one of the crash dump patches.  These save
-    data to a floppy disk or video rom or a swap partition.  None of
-    these are standard kernel patches so you have to find and apply
-    them yourself.  Search kernel archives for kmsgdump, lkcd and
-    oops+smram.
+(3) Use Kdump (see Documentation/kdump/kdump.txt),
+    extract the kernel ring buffer from old memory with using dmesg
+    gdbmacro in Documentation/kdump/gdbmacros.txt.

 
 
 Full Information
 
 
 Full Information