Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Kefeng Wang |
184 |
85.19% |
1 |
14.29% |
| Oscar Salvador |
22 |
10.19% |
1 |
14.29% |
| Stanislaw Gruszka |
4 |
1.85% |
1 |
14.29% |
| Linus Torvalds (pre-git) |
3 |
1.39% |
2 |
28.57% |
| Arun K S |
2 |
0.93% |
1 |
14.29% |
| Kirill A. Shutemov |
1 |
0.46% |
1 |
14.29% |
| Total |
216 |
|
7 |
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/page-isolation.h>
unsigned int _debug_guardpage_minorder;
bool _debug_pagealloc_enabled_early __read_mostly
= IS_ENABLED(CONFIG_DEBUG_PAGEALLOC_ENABLE_DEFAULT);
EXPORT_SYMBOL(_debug_pagealloc_enabled_early);
DEFINE_STATIC_KEY_FALSE(_debug_pagealloc_enabled);
EXPORT_SYMBOL(_debug_pagealloc_enabled);
DEFINE_STATIC_KEY_FALSE(_debug_guardpage_enabled);
static int __init early_debug_pagealloc(char *buf)
{
return kstrtobool(buf, &_debug_pagealloc_enabled_early);
}
early_param("debug_pagealloc", early_debug_pagealloc);
static int __init debug_guardpage_minorder_setup(char *buf)
{
unsigned long res;
if (kstrtoul(buf, 10, &res) < 0 || res > MAX_PAGE_ORDER / 2) {
pr_err("Bad debug_guardpage_minorder value\n");
return 0;
}
_debug_guardpage_minorder = res;
pr_info("Setting debug_guardpage_minorder to %lu\n", res);
return 0;
}
early_param("debug_guardpage_minorder", debug_guardpage_minorder_setup);
bool __set_page_guard(struct zone *zone, struct page *page, unsigned int order)
{
if (order >= debug_guardpage_minorder())
return false;
__SetPageGuard(page);
INIT_LIST_HEAD(&page->buddy_list);
set_page_private(page, order);
return true;
}
void __clear_page_guard(struct zone *zone, struct page *page, unsigned int order)
{
__ClearPageGuard(page);
set_page_private(page, 0);
}