linux-kernel - [PATCHSET] block: improve tracepoints

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Date:	Wed,  9 Jan 2013 08:45:03 -0800
From:	Tejun Heo <tj@...nel.org>
To:	axboe@...nel.dk
Cc:	linux-kernel@...r.kernel.org, chavey@...gle.com
Subject: [PATCHSET] block: improve tracepoints

Hello, Jens.

This patchset fixes/improves bio_complete TP so that block layer
proper triggers for all completing bios instead of stackign drivers
triggering them manually and adds more buffer / block / writeback TPs.
These improve visibility in general and are already in use in google.

This patchset contains the following five patches.

 0001-block-add-missing-block_bio_complete-tracepoint.patch
 0002-block-add-req-to-bio_-front-back-_merge-tracepoints.patch
 0003-buffer-make-touch_buffer-an-exported-function.patch
 0004-block-add-block_touch_buffer-tracepoint.patch
 0005-writeback-add-more-tracepoints.patch

It's based on top of v3.8-rc2 and also available in the following git
branch.

 git://git.kernel.org/pub/scm/linux/kernel/git/tj/misc.git block-tps

diffstat follows.  Thanks.

 block/blk-core.c                 |    5 -
 drivers/md/dm.c                  |    1 
 drivers/md/raid5.c               |   11 ---
 fs/bio.c                         |    2 
 fs/buffer.c                      |    8 ++
 fs/fs-writeback.c                |   17 ++++
 include/linux/blktrace_api.h     |    1 
 include/linux/buffer_head.h      |    2 
 include/trace/events/block.h     |   78 ++++++++++++++++++----
 include/trace/events/writeback.h |  135 +++++++++++++++++++++++++++++++++++++++
 kernel/trace/blktrace.c          |   28 +++++++-
 mm/page-writeback.c              |    2 
 12 files changed, 255 insertions(+), 35 deletions(-)

--
tejun
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