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.
103 lines
2.6 KiB
103 lines
2.6 KiB
/*
|
|
* This is a reproducer copied from one of LKML patch submission,
|
|
* which subject is
|
|
*
|
|
* [PATCH] mlock: revert the optimization for dirtying pages and triggering writeback.
|
|
*
|
|
* "In 5ecfda0, we do some optimization in mlock, but it causes
|
|
* a very basic test case(attached below) of mlock to fail. So
|
|
* this patch revert it with some tiny modification so that it
|
|
* apply successfully with the lastest 38-rc2 kernel."
|
|
*
|
|
* Copyright (C) 2010 Red Hat, Inc.
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of version 2 of the GNU General Public
|
|
* License as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* Further, this software is distributed without any warranty that it
|
|
* is free of the rightful claim of any third person regarding
|
|
* infringement or the like. Any license provided herein, whether
|
|
* implied or otherwise, applies only to this software file. Patent
|
|
* licenses, if any, provided herein do not apply to combinations of
|
|
* this program with other software, or any other product whatsoever.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
* 02110-1301, USA.
|
|
*/
|
|
#include "test.h"
|
|
#include "safe_macros.h"
|
|
#include "config.h"
|
|
|
|
char *TCID = "mlock04";
|
|
int TST_TOTAL = 1;
|
|
|
|
#include <sys/mman.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <errno.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
|
|
int fd, file_len = 40960;
|
|
char *testfile = "test_mlock";
|
|
|
|
static void setup(void);
|
|
static void cleanup(void);
|
|
|
|
int main(void)
|
|
{
|
|
char *buf;
|
|
int lc;
|
|
|
|
setup();
|
|
|
|
for (lc = 0; TEST_LOOPING(lc); lc++) {
|
|
buf = mmap(NULL, file_len, PROT_WRITE, MAP_SHARED, fd, 0);
|
|
|
|
if (buf == MAP_FAILED)
|
|
tst_brkm(TBROK | TERRNO, cleanup, "mmap");
|
|
|
|
if (mlock(buf, file_len) == -1)
|
|
tst_brkm(TBROK | TERRNO, cleanup, "mlock");
|
|
|
|
tst_resm(TINFO, "locked %d bytes from %p", file_len, buf);
|
|
|
|
if (munlock(buf, file_len) == -1)
|
|
tst_brkm(TBROK | TERRNO, cleanup, "munlock");
|
|
|
|
SAFE_MUNMAP(cleanup, buf, file_len);
|
|
}
|
|
|
|
tst_resm(TPASS, "test succeeded.");
|
|
|
|
cleanup();
|
|
|
|
tst_exit();
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
tst_tmpdir();
|
|
|
|
fd = SAFE_OPEN(cleanup, testfile, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR);
|
|
|
|
SAFE_FTRUNCATE(cleanup, fd, file_len);
|
|
|
|
TEST_PAUSE;
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
close(fd);
|
|
|
|
tst_rmdir();
|
|
}
|