mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-24 11:34:50 +08:00
29f34d1dd6
The memfd & fuse tests will share more common code in the following commits to test hugetlb support. Link: http://lkml.kernel.org/r/20171107122800.25517-9-marcandre.lureau@redhat.com Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: David Herrmann <dh.herrmann@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
47 lines
814 B
C
47 lines
814 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
#define _GNU_SOURCE
|
|
#define __EXPORTED_HEADERS__
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/memfd.h>
|
|
#include <unistd.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include "common.h"
|
|
|
|
int hugetlbfs_test = 0;
|
|
|
|
/*
|
|
* Copied from mlock2-tests.c
|
|
*/
|
|
unsigned long default_huge_page_size(void)
|
|
{
|
|
unsigned long hps = 0;
|
|
char *line = NULL;
|
|
size_t linelen = 0;
|
|
FILE *f = fopen("/proc/meminfo", "r");
|
|
|
|
if (!f)
|
|
return 0;
|
|
while (getline(&line, &linelen, f) > 0) {
|
|
if (sscanf(line, "Hugepagesize: %lu kB", &hps) == 1) {
|
|
hps <<= 10;
|
|
break;
|
|
}
|
|
}
|
|
|
|
free(line);
|
|
fclose(f);
|
|
return hps;
|
|
}
|
|
|
|
int sys_memfd_create(const char *name, unsigned int flags)
|
|
{
|
|
if (hugetlbfs_test)
|
|
flags |= MFD_HUGETLB;
|
|
|
|
return syscall(__NR_memfd_create, name, flags);
|
|
}
|