Added in new message updates to the documentation.

---
 doc/blktrace.tex |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

index 7e08543..82c35e8 100644
@@ -21,7 +21,7 @@
 \title{blktrace User Guide}
 \author{blktrace: Jens Axboe ([email protected])\\
         User Guide: Alan D. Brunelle ([email protected])}
-\date{18 February 2007}
+\date{27 May 2008}
 
 \begin{document}
 \maketitle

@@ -536,6 +536,9 @@ Short              & Long                       &

Description \\ \hline\hline
using better hardware - either a better io controller, or a platform with an IOMMU.

+ \item[m -- message] Text message generated via kernel call to
+ \texttt{blk\_add\_trace\_msg}.
+
\item[M -- back merge] A previously inserted request exists that ends on the boundary of where this io begins, so the io scheduler can merge them together.
@@ -721,6 +724,9 @@ The default output for all event types includes this header.
\item[A -- remap] Sector and length is output, along with the original device and sector offset.

+ \item[m -- message] The supplied message is appended to the end of
+ the standard header.
+
\end{description}

%------------------------------
@@ -796,6 +802,11 @@ kernel routine invocable interfaces:
Adds a trace with a remap event. \emph{dev} and \emph{sector} denote the original device this \emph{bio} was mapped from.

+ \item[blk\_add\_trace\_msg(struct request\_queue *q, char *fmt, ...)]
+ Adds a formatted message to the output stream. The total message
+ size can not exceed BLK\_TN\_MSG\_MSG characters (currently
+ 1024). Standard format conversions are supported (as supplied
+ by \texttt{vscnprintf}.

\end{description}
\end{document}

1.5.4.3