Hi, This is the minimal IO-less balance_dirty_pages() changes that are expected to be regression free (well, except for NFS). git://github.com/fengguang/linux.git dirty-throttling-v12 Tests results will be posted in a separate email. Changes since v11: - improve bdi reserve area parameters (based on test results) - drop bdi underrun flag - drop aux bdi control line - make bdi->dirty_ratelimit more stable Changes since v10: - complete the renames - add protections for IO queue underrun - pause time reduction - bdi reserve area - bdi underrun flag - more accurate task dirty accounting for - sub-page writes - FS re-dirties - short lived tasks 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, Andrea and Jan for the careful reviews! shortlog: Wu Fengguang (11): writeback: account per-bdi accumulated dirtied pages writeback: dirty position control writeback: add bg_threshold parameter to __bdi_update_bandwidth() writeback: dirty rate control writeback: stabilize bdi->dirty_ratelimit writeback: per task dirty rate limit writeback: IO-less balance_dirty_pages() writeback: limit max dirty pause time writeback: control dirty pause time writeback: dirty position control - bdi reserve area writeback: per-bdi background threshold diffstat: fs/fs-writeback.c | 19 +- include/linux/backing-dev.h | 11 + include/linux/sched.h | 7 + include/linux/writeback.h | 1 + include/trace/events/writeback.h | 24 -- kernel/fork.c | 3 + mm/backing-dev.c | 4 + mm/page-writeback.c | 678 +++++++++++++++++++++++++++++--------- 8 files changed, 566 insertions(+), 181 deletions(-) Thanks, Fengguang -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html