You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
38 lines
1.1 KiB
38 lines
1.1 KiB
7 months ago
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2018 FUJITSU LIMITED. All rights reserved.
|
||
|
|
* Author(s): Xiao Yang <yangx.jy@cn.fujitsu.com>
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define TST_NO_DEFAULT_MAIN
|
||
|
|
|
||
|
|
#include <unistd.h>
|
||
|
|
#include "tst_test.h"
|
||
|
|
#include "ksm_helper.h"
|
||
|
|
|
||
|
|
void wait_ksmd_full_scan(void)
|
||
|
|
{
|
||
|
|
unsigned long full_scans, at_least_one_full_scan;
|
||
|
|
int count = 0;
|
||
|
|
|
||
|
|
SAFE_FILE_SCANF(PATH_KSM "full_scans", "%lu", &full_scans);
|
||
|
|
/*
|
||
|
|
* The current scan is already in progress so we can't guarantee that
|
||
|
|
* the get_user_pages() is called on every existing rmap_item if we
|
||
|
|
* only waited for the remaining part of the scan.
|
||
|
|
*
|
||
|
|
* The actual merging happens after the unstable tree has been built so
|
||
|
|
* we need to wait at least two full scans to guarantee merging, hence
|
||
|
|
* wait full_scans to increment by 3 so that at least two full scans
|
||
|
|
* will run.
|
||
|
|
*/
|
||
|
|
at_least_one_full_scan = full_scans + 3;
|
||
|
|
while (full_scans < at_least_one_full_scan) {
|
||
|
|
sleep(1);
|
||
|
|
count++;
|
||
|
|
SAFE_FILE_SCANF(PATH_KSM "full_scans", "%lu", &full_scans);
|
||
|
|
}
|
||
|
|
|
||
|
|
tst_res(TINFO, "ksm daemon takes %ds to run two full scans", count);
|
||
|
|
}
|