#!/bin/sh

# flush memory with readonly shm/tmpfs pages

# Unfortunately the kernel disables anon LRU scan on zero swap space.
# If run a patched kernel without that kernel optimization, 
# this script may trigger OOM which I suspect to be some kernel bug.

# lru_lock coverage
# 1781926	____pagevec_lru_add
#  736056	shrink_inactive_list

. ./hw_vars

for i in `seq 1 $nr_task`
do
	create_sparse_file $SHM_FILE-$i $shm_size
	$USEMEM -f $SHM_FILE-$i --readonly $((shm_size / nr_task / 2)) &
done

wait

rm `seq -f $SHM_FILE-%g 1 $nr_task`