| commit | 82791940545be38810dfd5e03ee701e749f04aab | [log] [tgz] |
|---|---|---|
| author | Wu Fengguang <fengguang.wu@intel.com> | Sat Dec 03 21:26:01 2011 -0600 |
| committer | Wu Fengguang <fengguang.wu@intel.com> | Sun Dec 18 14:20:31 2011 +0800 |
| tree | 427e4b1f535dfa483de6b71d1f59c13fd07a0ff9 | |
| parent | 5b9b357435a51ff14835c06d8b00765a4c68f313 [diff] |
writeback: do strict bdi dirty_exceeded This helps to reduce dirty throttling polls and hence CPU overheads. bdi->dirty_exceeded typically only helps when suddenly starting 100+ dd's on a disk, in which case the dd's may need to poll balance_dirty_pages() earlier than tsk->nr_dirtied_pause. CC: Jan Kara <jack@suse.cz> CC: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>