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Commit c4a25635 authored by Mel Gorman's avatar Mel Gorman Committed by Linus Torvalds

mm: move vmscan writes and file write accounting to the node

As reclaim is now node-based, it follows that page write activity due to
page reclaim should also be accounted for on the node.  For consistency,
also account page writes and page dirtying on a per-node basis.

After this patch, there are a few remaining zone counters that may appear
strange but are fine.  NUMA stats are still per-zone as this is a
user-space interface that tools consume.  NR_MLOCK, NR_SLAB_*,
NR_PAGETABLE, NR_KERNEL_STACK and NR_BOUNCE are all allocations that
potentially pin low memory and cannot trivially be reclaimed on demand.
This information is still useful for debugging a page allocation failure

Link: default avatarMel Gorman <>
Acked-by: default avatarVlastimil Babka <>
Acked-by: default avatarMichal Hocko <>
Cc: Hillf Danton <>
Acked-by: default avatarJohannes Weiner <>
Cc: Joonsoo Kim <>
Cc: Minchan Kim <>
Cc: Rik van Riel <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 11fb9989
......@@ -122,10 +122,6 @@ enum zone_stat_item {
/* Second 128 byte cacheline */
NR_VMSCAN_IMMEDIATE, /* Prioritise for reclaim when writeback ends */
NR_DIRTIED, /* page dirtyings since bootup */
NR_WRITTEN, /* page writings since bootup */
NR_ZSPAGES, /* allocated in zsmalloc */
......@@ -165,6 +161,10 @@ enum node_stat_item {
NR_UNSTABLE_NFS, /* NFS unstable pages */
NR_VMSCAN_IMMEDIATE, /* Prioritise for reclaim when writeback ends */
NR_DIRTIED, /* page dirtyings since bootup */
NR_WRITTEN, /* page writings since bootup */
......@@ -415,8 +415,8 @@ TRACE_EVENT(global_dirty_state,
__entry->nr_dirty = global_node_page_state(NR_FILE_DIRTY);
__entry->nr_writeback = global_node_page_state(NR_WRITEBACK);
__entry->nr_unstable = global_node_page_state(NR_UNSTABLE_NFS);
__entry->nr_dirtied = global_page_state(NR_DIRTIED);
__entry->nr_written = global_page_state(NR_WRITTEN);
__entry->nr_dirtied = global_node_page_state(NR_DIRTIED);
__entry->nr_written = global_node_page_state(NR_WRITTEN);
__entry->background_thresh = background_thresh;
__entry->dirty_thresh = dirty_thresh;
__entry->dirty_limit = global_wb_domain.dirty_limit;
......@@ -2461,7 +2461,7 @@ 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_zone_page_state(page, NR_DIRTIED);
__inc_node_page_state(page, NR_DIRTIED);
__inc_wb_stat(wb, WB_RECLAIMABLE);
__inc_wb_stat(wb, WB_DIRTIED);
......@@ -2550,7 +2550,7 @@ void account_page_redirty(struct page *page)
wb = unlocked_inode_to_wb_begin(inode, &locked);
dec_zone_page_state(page, NR_DIRTIED);
dec_node_page_state(page, NR_DIRTIED);
dec_wb_stat(wb, WB_DIRTIED);
unlocked_inode_to_wb_end(inode, locked);
......@@ -2787,7 +2787,7 @@ int test_clear_page_writeback(struct page *page)
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_zone_page_state(page, NR_WRITTEN);
inc_node_page_state(page, NR_WRITTEN);
return ret;
......@@ -612,7 +612,7 @@ static pageout_t pageout(struct page *page, struct address_space *mapping,
inc_zone_page_state(page, NR_VMSCAN_WRITE);
inc_node_page_state(page, NR_VMSCAN_WRITE);
......@@ -1117,7 +1117,7 @@ static unsigned long shrink_page_list(struct list_head *page_list,
* except we already have the page isolated
* and know it's dirty
inc_zone_page_state(page, NR_VMSCAN_IMMEDIATE);
inc_node_page_state(page, NR_VMSCAN_IMMEDIATE);
goto keep_locked;
......@@ -931,10 +931,6 @@ const char * const vmstat_text[] = {
......@@ -971,6 +967,10 @@ const char * const vmstat_text[] = {
/* enum writeback_stat_item counters */
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