shrink_page_list() reclaims the pages. But the statistical data may be inaccurate since some pages are CMA pages. If kernel needs to reclaim unmovable memory (GFP_KERNEL flag), free CMA pages should not be counted in nr_reclaimed pages. Signed-off-by: Haojian Zhuang <haojian.zhuang@xxxxxxxxx> --- mm/vmscan.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/mm/vmscan.c b/mm/vmscan.c index 2cff0d4..0cbe393 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -720,6 +720,10 @@ static unsigned long shrink_page_list(struct list_head *page_list, unsigned long nr_reclaimed = 0; unsigned long nr_writeback = 0; unsigned long nr_immediate = 0; +#ifdef CONFIG_CMA + /* Number of pages freed with MIGRATE_CMA type */ + unsigned long nr_reclaimed_cma = 0; +#endif cond_resched(); @@ -987,6 +991,11 @@ static unsigned long shrink_page_list(struct list_head *page_list, * leave it off the LRU). */ nr_reclaimed++; +#ifdef CONFIG_CMA + if (get_pageblock_migratetype(page) == + MIGRATE_CMA) + nr_reclaimed_cma++; +#endif continue; } } @@ -1005,6 +1014,10 @@ static unsigned long shrink_page_list(struct list_head *page_list, __clear_page_locked(page); free_it: nr_reclaimed++; +#ifdef CONFIG_CMA + if (get_pageblock_migratetype(page) == MIGRATE_CMA) + nr_reclaimed_cma++; +#endif /* * Is there need to periodically free_page_list? It would @@ -1044,6 +1057,10 @@ keep: *ret_nr_unqueued_dirty += nr_unqueued_dirty; *ret_nr_writeback += nr_writeback; *ret_nr_immediate += nr_immediate; +#ifdef CONFIG_CMA + if (allocflags_to_migratetype(sc->gfp_mask) == MIGRATE_UNMOVABLE) + nr_reclaimed -= nr_reclaimed_cma; +#endif return nr_reclaimed; } -- 1.8.1.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>