On 03/04/2017 04:23 AM, David Rientjes wrote: > Initscripts can use the information (protection levels) from > /proc/zoneinfo to configure vm.lowmem_reserve_ratio at boot. > > vm.lowmem_reserve_ratio is an array of ratios for each configured zone on > the system. If a zone is not populated on an arch, /proc/zoneinfo > suppresses its output. > > This results in there not being a 1:1 mapping between the set of zones > emitted by /proc/zoneinfo and the zones configured by > vm.lowmem_reserve_ratio. > > This patch shows statistics for non-populated zones in /proc/zoneinfo. > The zones exist and hold a spot in the vm.lowmem_reserve_ratio array. > Without this patch, it is not possible to determine which index in the > array controls which zone if one or more zones on the system are not > populated. > > Remaining users of walk_zones_in_node() are unchanged. Files such as > /proc/pagetypeinfo require certain zone data to be initialized properly > for display, which is not done for unpopulated zones. > > Signed-off-by: David Rientjes <rient...@google.com>
Reviewed-by: Anshuman Khandual <khand...@linux.vnet.ibm.com>
