@@ -14,6 +14,8 @@
#define PAGE_REPORTING_DELAY (2 * HZ)
#define MAX_SCAN_NUM 1024
+unsigned long page_report_batch_size __read_mostly = 4 * 1024 * 1024UL;
+
static struct page_reporting_dev_info __rcu *pr_dev_info __read_mostly;
enum {
@@ -12,6 +12,8 @@
#define PAGE_REPORTING_MIN_ORDER pageblock_order
+extern unsigned long page_report_batch_size;
+
#ifdef CONFIG_PAGE_REPORTING
DECLARE_STATIC_KEY_FALSE(page_reporting_enabled);
void __page_reporting_notify(void);
@@ -33,6 +35,8 @@ static inline bool page_reported(struct page *page)
*/
static inline void page_reporting_notify_free(unsigned int order)
{
+ static long batch_size;
+
/* Called from hot path in __free_one_page() */
if (!static_branch_unlikely(&page_reporting_enabled))
return;
@@ -41,8 +45,12 @@ static inline void page_reporting_notify_free(unsigned int order)
if (order < PAGE_REPORTING_MIN_ORDER)
return;
- /* This will add a few cycles, but should be called infrequently */
- __page_reporting_notify();
+ batch_size += (1 << order) << PAGE_SHIFT;
+ if (batch_size >= page_report_batch_size) {
+ batch_size = 0;
+ /* This add a few cycles, but should be called infrequently */
+ __page_reporting_notify();
+ }
}
#else /* CONFIG_PAGE_REPORTING */
#define page_reported(_page) false
Use the page order as the only threshold for page reporting is not flexible, add a batch size as another threshold, so the reporting will be triggered only when the amount of free page is bigger than the batch size. Cc: Alexander Duyck <alexander.h.duyck@linux.intel.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: David Hildenbrand <david@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: liliangleo <liliangleo@didiglobal.com> --- mm/page_reporting.c | 2 ++ mm/page_reporting.h | 12 ++++++++++-- 2 files changed, 12 insertions(+), 2 deletions(-)