| commit | 82e230a07de3812a5e87a27979f033dad59172e3 | [log] [tgz] |
|---|---|---|
| author | Wu Fengguang <fengguang.wu@intel.com> | Fri Dec 02 18:21:51 2011 -0600 |
| committer | Wu Fengguang <fengguang.wu@intel.com> | Thu Dec 08 10:49:29 2011 +0800 |
| tree | 672ecaa3a1cf3585aa941491b2cf77ae38f1d8ff | |
| parent | c5c6343c4d75f9d3226e05a72e7861e967fc8099 [diff] |
writeback: set max_pause to lowest value on zero bdi_dirty Some trace shows lots of bdi_dirty=0 lines where it's actually some small value if w/o the accounting errors in the per-cpu bdi stats. In this case the max pause time should really be set to the smallest (non-zero) value to avoid IO queue underrun and improve throughput. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>