Merge "mm: do not shrink pages marked for reclaim by MADV_FREE" (59ba7003) · Commits · e / devices / android_kernel_fairphone_FP5

fs/proc/task_mmu.c

+12 −0

Original line number	Diff line number	Diff line
		@@ -1742,6 +1742,18 @@ static int reclaim_pte_range(pmd_t *pmd, unsigned long addr,
		if (isolate_lru_page(compound_head(page)))
		continue;

		/* MADV_FREE clears pte dirty bit and then marks the page
		* lazyfree (clear SwapBacked). Inbetween if this lazyfreed page
		* is touched by user then it becomes dirty. PPR in
		* shrink_page_list in try_to_unmap finds the page dirty, marks
		* it back as PageSwapBacked and skips reclaim. This can cause
		* isolated count mismatch.
		*/
		if (PageAnon(page) && !PageSwapBacked(page)) {
		putback_lru_page(page);
		continue;
		}

		list_add(&page->lru, &page_list);
		inc_node_page_state(page, NR_ISOLATED_ANON +
		page_is_file_cache(page));