summaryrefslogtreecommitdiffstats
path: root/mm/kmemcheck.c
diff options
context:
space:
mode:
authorWu Fengguang <fengguang.wu@intel.com>2011-08-04 22:16:46 -0600
committerWu Fengguang <fengguang.wu@intel.com>2011-10-03 21:08:58 +0800
commit8927f66c4ede9a18b4b58f7e6f9debca67065f6b (patch)
treef7c8490ab23a20cb86874ca8112f3dd1fc6002ae /mm/kmemcheck.c
parent57fc978cfb61ed40a7bbfe5a569359159ba31abd (diff)
writeback: dirty position control - bdi reserve area
Keep a minimal pool of dirty pages for each bdi, so that the disk IO queues won't underrun. Also gently increase a small bdi_thresh to avoid it stuck in 0 for some light dirtied bdi. It's particularly useful for JBOD and small memory system. It may result in (pos_ratio > 1) at the setpoint and push the dirty pages high. This is more or less intended because the bdi is in the danger of IO queue underflow. Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Diffstat (limited to 'mm/kmemcheck.c')
0 files changed, 0 insertions, 0 deletions