drm/tegra: dsi: Enhance runtime power management

[cascardo/linux.git] / mm / page-writeback.c

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index 573d138..f4cd7d8 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -299,17 +299,13 @@ static unsigned long node_dirtyable_memory(struct pglist_data *pgdat)
 
        return nr_pages;
 }
-#ifdef CONFIG_HIGHMEM
-atomic_t highmem_file_pages;
-#endif
 
 static unsigned long highmem_dirtyable_memory(unsigned long total)
 {
 #ifdef CONFIG_HIGHMEM
        int node;
-       unsigned long x;
+       unsigned long x = 0;
        int i;
-       unsigned long dirtyable = 0;
 
        for_each_node_state(node, N_HIGH_MEMORY) {
                for (i = ZONE_NORMAL + 1; i < MAX_NR_ZONES; i++) {
@@ -326,12 +322,12 @@ static unsigned long highmem_dirtyable_memory(unsigned long total)
                        nr_pages = zone_page_state(z, NR_FREE_PAGES);
                        /* watch for underflows */
                        nr_pages -= min(nr_pages, high_wmark_pages(z));
-                       dirtyable += nr_pages;
+                       nr_pages += zone_page_state(z, NR_ZONE_INACTIVE_FILE);
+                       nr_pages += zone_page_state(z, NR_ZONE_ACTIVE_FILE);
+                       x += nr_pages;
                }
        }
 
-       x = dirtyable + atomic_read(&highmem_file_pages);
-
        /*
         * Unreclaimable memory (kernel memory or anonymous memory
         * without swap) can bring down the dirtyable pages below
@@ -2466,6 +2462,7 @@ void account_page_dirtied(struct page *page, struct address_space *mapping)
 
                mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_DIRTY);
                __inc_node_page_state(page, NR_FILE_DIRTY);
+               __inc_zone_page_state(page, NR_ZONE_WRITE_PENDING);
                __inc_node_page_state(page, NR_DIRTIED);
                __inc_wb_stat(wb, WB_RECLAIMABLE);
                __inc_wb_stat(wb, WB_DIRTIED);
@@ -2487,6 +2484,7 @@ void account_page_cleaned(struct page *page, struct address_space *mapping,
        if (mapping_cap_account_dirty(mapping)) {
                mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_DIRTY);
                dec_node_page_state(page, NR_FILE_DIRTY);
+               dec_zone_page_state(page, NR_ZONE_WRITE_PENDING);
                dec_wb_stat(wb, WB_RECLAIMABLE);
                task_io_account_cancelled_write(PAGE_SIZE);
        }
@@ -2743,6 +2741,7 @@ int clear_page_dirty_for_io(struct page *page)
                if (TestClearPageDirty(page)) {
                        mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_DIRTY);
                        dec_node_page_state(page, NR_FILE_DIRTY);
+                       dec_zone_page_state(page, NR_ZONE_WRITE_PENDING);
                        dec_wb_stat(wb, WB_RECLAIMABLE);
                        ret = 1;
                }
@@ -2789,6 +2788,7 @@ int test_clear_page_writeback(struct page *page)
        if (ret) {
                mem_cgroup_dec_page_stat(page, MEM_CGROUP_STAT_WRITEBACK);
                dec_node_page_state(page, NR_WRITEBACK);
+               dec_zone_page_state(page, NR_ZONE_WRITE_PENDING);
                inc_node_page_state(page, NR_WRITTEN);
        }
        unlock_page_memcg(page);
@@ -2843,6 +2843,7 @@ int __test_set_page_writeback(struct page *page, bool keep_write)
        if (!ret) {
                mem_cgroup_inc_page_stat(page, MEM_CGROUP_STAT_WRITEBACK);
                inc_node_page_state(page, NR_WRITEBACK);
+               inc_zone_page_state(page, NR_ZONE_WRITE_PENDING);
        }
        unlock_page_memcg(page);
        return ret;