mirror of https://github.com/Qortal/Brooklyn
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.
47 lines
995 B
47 lines
995 B
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* test_free_pages.c: Check that free_pages() doesn't leak memory |
|
* Copyright (c) 2020 Oracle |
|
* Author: Matthew Wilcox <[email protected]> |
|
*/ |
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
|
|
|
#include <linux/gfp.h> |
|
#include <linux/mm.h> |
|
#include <linux/module.h> |
|
|
|
static void test_free_pages(gfp_t gfp) |
|
{ |
|
unsigned int i; |
|
|
|
for (i = 0; i < 1000 * 1000; i++) { |
|
unsigned long addr = __get_free_pages(gfp, 3); |
|
struct page *page = virt_to_page(addr); |
|
|
|
/* Simulate page cache getting a speculative reference */ |
|
get_page(page); |
|
free_pages(addr, 3); |
|
put_page(page); |
|
} |
|
} |
|
|
|
static int m_in(void) |
|
{ |
|
pr_info("Testing with GFP_KERNEL\n"); |
|
test_free_pages(GFP_KERNEL); |
|
pr_info("Testing with GFP_KERNEL | __GFP_COMP\n"); |
|
test_free_pages(GFP_KERNEL | __GFP_COMP); |
|
pr_info("Test completed\n"); |
|
|
|
return 0; |
|
} |
|
|
|
static void m_ex(void) |
|
{ |
|
} |
|
|
|
module_init(m_in); |
|
module_exit(m_ex); |
|
MODULE_AUTHOR("Matthew Wilcox <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|