diff options
| author | Kefeng Wang <wangkefeng.wang@huawei.com> | 2023-05-16 14:38:17 +0800 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-09 16:25:24 -0700 |
| commit | 31a1b9d7fe768db521b12287ec6426983e9787e3 (patch) | |
| tree | c72d41f5518c0f6d28c9a3756f17403eee24b30b /kernel/power | |
| parent | 884c175f12ce1fabff18ac113349628149fc6cf2 (diff) | |
| download | linux-31a1b9d7fe768db521b12287ec6426983e9787e3.tar.gz | |
mm: page_alloc: move mark_free_page() into snapshot.c
The mark_free_page() is only used in kernel/power/snapshot.c, move it out
to reduce a bit of page_alloc.c
Link: https://lkml.kernel.org/r/20230516063821.121844-10-wangkefeng.wang@huawei.com
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: "Huang, Ying" <ying.huang@intel.com>
Cc: Iurii Zaikin <yzaikin@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Mike Rapoport (IBM) <rppt@kernel.org>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Rafael J. Wysocki <rafael@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/snapshot.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c index cd8b7b35f1e8b..45ef0bf81c857 100644 --- a/kernel/power/snapshot.c +++ b/kernel/power/snapshot.c @@ -1228,6 +1228,58 @@ unsigned int snapshot_additional_pages(struct zone *zone) return 2 * rtree; } +/* + * Touch the watchdog for every WD_PAGE_COUNT pages. + */ +#define WD_PAGE_COUNT (128*1024) + +static void mark_free_pages(struct zone *zone) +{ + unsigned long pfn, max_zone_pfn, page_count = WD_PAGE_COUNT; + unsigned long flags; + unsigned int order, t; + struct page *page; + + if (zone_is_empty(zone)) + return; + + spin_lock_irqsave(&zone->lock, flags); + + max_zone_pfn = zone_end_pfn(zone); + for (pfn = zone->zone_start_pfn; pfn < max_zone_pfn; pfn++) + if (pfn_valid(pfn)) { + page = pfn_to_page(pfn); + + if (!--page_count) { + touch_nmi_watchdog(); + page_count = WD_PAGE_COUNT; + } + + if (page_zone(page) != zone) + continue; + + if (!swsusp_page_is_forbidden(page)) + swsusp_unset_page_free(page); + } + + for_each_migratetype_order(order, t) { + list_for_each_entry(page, + &zone->free_area[order].free_list[t], buddy_list) { + unsigned long i; + + pfn = page_to_pfn(page); + for (i = 0; i < (1UL << order); i++) { + if (!--page_count) { + touch_nmi_watchdog(); + page_count = WD_PAGE_COUNT; + } + swsusp_set_page_free(pfn_to_page(pfn + i)); + } + } + } + spin_unlock_irqrestore(&zone->lock, flags); +} + #ifdef CONFIG_HIGHMEM /** * count_free_highmem_pages - Compute the total number of free highmem pages. |