Hi, While updating a workload to a 4.1 kernel (from 3.14), I found that min_free_kbytes was automatically set to 11365, whereas on 3.14 it was 67584. This is caused by a change to how min_free_kbytes is set when CONFIG_TRANSPARENT_HUGEPAGE=y, which is detailed in the patch that follows.
I was wondering as well if the setting of min_free_kbytes could be improved in the following cases while looking at this code: 1) memory hotplug we call init_per_zone_wmark_min() but not set_recommended_min_free_kbytes() (for hugepages) 2) when khugepaged is stopped Do we want to undo any settings thath khugepaged has done in that case to restore the default settings Thanks, -Jason Jason Baron (1): mm: update min_free_kbytes from khugepaged after core initialization mm/page_alloc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.6.1
