The patch titled
Subject: [v3] PM / Hibernate: Feed the wathdog when creating snapshot
has been added to the -mm tree. Its filename is
pm-hibernate-feed-the-wathdog-when-creating-snapshot-v3.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/pm-hibernate-feed-the-wathdog-when-creating-snapshot-v3.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/pm-hibernate-feed-the-wathdog-when-creating-snapshot-v3.patch
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------------------------------------------------------
From: Chen Yu <yu.c.chen@xxxxxxxxx>
Subject: [v3] PM / Hibernate: Feed the wathdog when creating snapshot
simplification
Link: http://lkml.kernel.org/r/1503460079-29721-1-git-send-email-yu.c.chen@xxxxxxxxx
Signed-off-by: Chen Yu <yu.c.chen@xxxxxxxxx>
Cc: Jan Filipcewicz <jan.filipcewicz@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/page_alloc.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff -puN mm/page_alloc.c~pm-hibernate-feed-the-wathdog-when-creating-snapshot-v3 mm/page_alloc.c
--- a/mm/page_alloc.c~pm-hibernate-feed-the-wathdog-when-creating-snapshot-v3
+++ a/mm/page_alloc.c
@@ -2537,14 +2537,13 @@ void drain_all_pages(struct zone *zone)
#ifdef CONFIG_HIBERNATION
/*
- * Touch the watchdog for every WD_INTERVAL_PAGE pages,
- * choose a power of 2 to avoid the modulus operation.
+ * Touch the watchdog for every WD_PAGE_COUNT pages.
*/
-#define WD_INTERVAL_PAGE (128*1024)
+#define WD_PAGE_COUNT (128*1024)
void mark_free_pages(struct zone *zone)
{
- unsigned long pfn, max_zone_pfn, page_num = 0;
+ unsigned long pfn, max_zone_pfn, page_count = WD_PAGE_COUNT;
unsigned long flags;
unsigned int order, t;
struct page *page;
@@ -2559,8 +2558,10 @@ void mark_free_pages(struct zone *zone)
if (pfn_valid(pfn)) {
page = pfn_to_page(pfn);
- if (!((page_num++) % WD_INTERVAL_PAGE))
+ if (!--page_count) {
touch_nmi_watchdog();
+ page_count = WD_PAGE_COUNT;
+ }
if (page_zone(page) != zone)
continue;
@@ -2576,8 +2577,10 @@ void mark_free_pages(struct zone *zone)
pfn = page_to_pfn(page);
for (i = 0; i < (1UL << order); i++) {
- if (!((page_num++) % WD_INTERVAL_PAGE))
+ if (!--page_count) {
touch_nmi_watchdog();
+ page_count = WD_PAGE_COUNT;
+ }
swsusp_set_page_free(pfn_to_page(pfn + i));
}
}
_
Patches currently in -mm which might be from yu.c.chen@xxxxxxxxx are
pm-hibernate-feed-the-wathdog-when-creating-snapshot.patch
pm-hibernate-feed-the-wathdog-when-creating-snapshot-v2.patch
pm-hibernate-feed-the-wathdog-when-creating-snapshot-v3.patch
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