Re: [PATCH v4] mm: introduce validity check on vm dirtiness settings

2017-09-21 Thread Jan Kara
On Thu 21-09-17 21:59:52, Yafang Shao wrote: > we can find the logic in domain_dirty_limits() that > when dirty bg_thresh is bigger than dirty thresh, > bg_thresh will be set as thresh * 1 / 2. > if (bg_thresh >= thresh) > bg_thresh = thresh / 2; > > But actually we can set vm

[PATCH v4] mm: introduce validity check on vm dirtiness settings

2017-09-20 Thread Yafang Shao
we can find the logic in domain_dirty_limits() that when dirty bg_thresh is bigger than dirty thresh, bg_thresh will be set as thresh * 1 / 2. if (bg_thresh >= thresh) bg_thresh = thresh / 2; But actually we can set vm background dirtiness bigger than vm dirtiness successfu