static void do_test(void)
{
long free;
long nproc;
long dummy;
SAFE_FILE_LINES_SCANF("/proc/meminfo", "MemFree: %ld", &free);
if (FILE_LINES_SCANF("/proc/stat", "processes %ld", &nproc))
tst_brk(TBROK, "Could not parse processes");
tst_res(TPASS, "Free: %ld, nproc: %ld", free, nproc);
if (FILE_LINES_SCANF("/proc/stat", "non-existent %ld", &dummy))
tst_res(TPASS, "non-existent not found");
SAFE_FILE_LINES_SCANF("/proc/stat", "non-existent %ld", &dummy);
}
static void memory_pressure_child(void)
{
size_t i, page_size = getpagesize();
char *ptr;
for (;;) {
ptr = mmap(NULL, 500 * page_size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
for (i = 0; i < 500; i++) {
ptr[i * page_size] = i % 100;
usleep(sleep_between_faults);
}
/* If swap accounting is disabled exit after process swapped out 100MB */
if (!swap_accounting_enabled) {
int swapped;
SAFE_FILE_LINES_SCANF("/proc/self/status", "VmSwap: %d", &swapped);
if (swapped > 100 * 1024)
exit(0);
}
}
abort();
}
static unsigned long get_cached_size(void)
{
unsigned long ret;
SAFE_FILE_LINES_SCANF(MEMINFO_FNAME, "Cached: %lu", &ret);
return ret;
}
static unsigned long get_bytes_read(void)
{
unsigned long ret;
SAFE_FILE_LINES_SCANF(PROC_IO_FNAME, "read_bytes: %lu", &ret);
return ret;
}
static void setup(void)
{
long int swap_total;
if (access(MEMCG_PATH, F_OK)) {
tst_brk(TCONF, "'" MEMCG_PATH
"' not present, CONFIG_MEMCG missing?");
}
if (!access(MEMCG_PATH "memory.memsw.limit_in_bytes", F_OK))
swap_accounting_enabled = 1;
else
tst_res(TINFO, "Swap accounting is disabled");
SAFE_FILE_LINES_SCANF("/proc/meminfo", "SwapTotal: %ld", &swap_total);
if (swap_total <= 0)
tst_brk(TCONF, "MADV_FREE does not work without swap");
page_size = getpagesize();
}