linux-kernel - Re: [PATCH 1/2] Trace code and documentation

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Message-Id: <20070913211210.1c21708c.randy.dunlap@oracle.com>
Date:	Thu, 13 Sep 2007 21:12:10 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	David Wilder <dwilder@...ibm.com>
Cc:	linux-kernel@...r.kernel.org,
	SystemTAP <systemtap@...rces.redhat.com>,
	akpm@...ux-foundation.org
Subject: Re: [PATCH 1/2] Trace code and documentation

On Thu, 13 Sep 2007 16:43:16 -0700 David Wilder wrote:

> [it would be easier to review and make sense of the comments
> if the patch were inline instead of attached]

Tom Zanussi <zanussi@...ibm.com>
Martin Hunt <hunt@...hat.com>
David Wilder <dwilder@...ibm.com>

Above needs to use Signed-off-by: if you want this merged.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

trace.txt:

+When using the READ(2) interface,

s/READ/read/

+   preemption is disabled and that trace state is  set to "running". a

s/. a/. A/

+on the function do_fork(). The value of current->pid is writen to

s/writen/written/

+You can build the kernel module fork_trace.ko using the following
+Makefile:

There was reportedly a discussion about sample source code in the
Documentation/ directory at the kernel summit.  Some people want to
move it to the util-linux package.  If that's not done, I strongly
prefer that Makefiles and source files be put into their own
sub-directory, not "hidden" inside txt files, so you would end up
with something line Documentation/trace/, with trace.txt, and also
Documentation/trace/src, with Makefile and fork_trace.c & any other
source files.

+Trace is adapted from blktrace authored by Jens Axboe (axboe@...e.de).

MAINTAINERS file says <axboe@...nel.dk>.  He's also
<jens.axboe@...cle.com>.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

lib/trace.c:

+ * Based on blktrace code, Copyright (C) 2006 Jens Axboe <axboe@...e.de>

Ditto.

+
+

Use just one blank line between functions and/or structs.

Please check the patch with scripts/checkpatch.pl and then evaluate
its warnings.  Sometimes it makes sense to ignore some of them.

+/**
+ *	trace_setup: create a new trace trace handle
+ *
+ *	@root: The root directory name in the root of the debugfs
+ *	       to place trace directories. Created as needed.

Thanks for using kernel-doc; however, don't put a blank line between
the function name line and the parameters.  Also, the function
name line should have a "-" separating the function name and the
short description.  (multiple places in trace.c)

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
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