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IO-less dirty throttling v10

From:  Wu Fengguang <>
To:  <>
Subject:  [PATCH 00/10] IO-less dirty throttling v10
Date:  Fri, 26 Aug 2011 19:38:13 +0800
Message-ID:  <>
Cc:  Peter Zijlstra <>
Archive-link:  Article


The core algorithms for IO-less balance_dirty_pages().

        git:// dirty-throttling-v10

Changes since v9:

- a lot of renames and comment/changelog rework, again
- seperate out the dirty_ratelimit update policy (as patch 04)
- add think time compensation
- add 3 trace events

Changes since v8:

- a lot of renames and comment/changelog rework
- use 3rd order polynomial as the global control line (Peter)
- stabilize dirty_ratelimit by decreasing update step size on small errors
- limit per-CPU dirtied pages to avoid dirty pages run away on 1k+ tasks (Peter)

Thanks a lot to Peter, Vivek and Andrea for the careful reviews!


	Wu Fengguang (10):
	      writeback: account per-bdi accumulated dirtied pages
	      writeback: dirty position control
	      writeback: dirty rate control
	      writeback: stabilize bdi->dirty_ratelimit
	      writeback: per task dirty rate limit
	      writeback: IO-less balance_dirty_pages()
	      writeback: dirty ratelimit - think time compensation
	      writeback: trace balance_dirty_pages
	      writeback: trace dirty_ratelimit
	      trace task_io (RFC)


	 fs/fs-writeback.c                |    2 +-
	 include/linux/backing-dev.h      |    8 +
	 include/linux/sched.h            |    8 +
	 include/linux/writeback.h        |    1 +
	 include/trace/events/writeback.h |  181 +++++++++--
	 kernel/fork.c                    |    4 +
	 mm/backing-dev.c                 |    3 +
	 mm/page-writeback.c              |  664 +++++++++++++++++++++++++++++---------
	 8 files changed, 693 insertions(+), 178 deletions(-)


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