#!/bin/sh

# flush memory and
# create lots of small continuous VMAs

. ./hw_vars

# vm_area_struct slab could consume a hell lot of memory for this small alloc test
# let's restrict it to 1/3 MemTotal
slab_mem_max=$((mem/3))
# vm_area_struct is 192 bytes, 1 page could host 21 vm_area_struct
# below is a line from slabinfo, where it shows 1 slab has 2 pages and 42 objects in these 2 pages.
# vm_area_struct           58264  60816    192   42    2 : tunables    0    0    0 : slabdata   1448   1448      0
vma_nr_max=$((21*slab_mem_max/4096))

size=$ROTATE_BYTES
unit_size=$((10 * pagesize))
while [ $((size/unit_size)) -gt $vma_nr_max ]
do
	size=$((size>>1))
done