[PATCH 2/4] mm: change deactivate_page with deactivate_file_page

Minchan Kim
2015-03-11T01:20:50Z

Deactivate_page was born for file invalidation so it has too
specific logic for file-backed pages. So, let's change the name
of function to file-specific and yield the generic name.

Signed-off-by: Minchan Kim <minchan@kernel.org>
---
include/linux/swap.h | 2 +-
mm/swap.c | 20 ++++++++++----------
mm/truncate.c | 2 +-
3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/include/linux/swap.h b/include/linux/swap.h
index 7067eca..cee108c 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -307,7 +307,7 @@ extern void lru_add_drain(void);
extern void lru_add_drain_cpu(int cpu);
extern void lru_add_drain_all(void);
extern void rotate_reclaimable_page(struct page *page);
-extern void deactivate_page(struct page *page);
+extern void deactivate_file_page(struct page *page);
extern void swap_setup(void);

extern void add_page_to_unevictable_list(struct page *page);
diff --git a/mm/swap.c b/mm/swap.c
index cd3a5e6..5b2a605 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -42,7 +42,7 @@ int page_cluster;

static DEFINE_PER_CPU(struct pagevec, lru_add_pvec);
static DEFINE_PER_CPU(struct pagevec, lru_rotate_pvecs);
-static DEFINE_PER_CPU(struct pagevec, lru_deactivate_pvecs);
+static DEFINE_PER_CPU(struct pagevec, lru_deactivate_file_pvecs);

/*
* This path almost never happens for VM activity - pages are normally
@@ -743,7 +743,7 @@ void lru_cache_add_active_or_unevictable(struct page *page,
* be write it out by flusher threads as this is much more effective
* than the single-page writeout from reclaim.
*/
-static void lru_deactivate_fn(struct page *page, struct lruvec *lruvec,
+static void lru_deactivate_file_fn(struct page *page, struct lruvec *lruvec,
void *arg)
{
int lru, file;
@@ -811,22 +811,22 @@ void lru_add_drain_cpu(int cpu)
local_irq_restore(flags);
}

- pvec = &per_cpu(lru_deactivate_pvecs, cpu);
+ pvec = &per_cpu(lru_deactivate_file_pvecs, cpu);
if (pagevec_count(pvec))
- pagevec_lru_move_fn(pvec, lru_deactivate_fn, NULL);
+ pagevec_lru_move_fn(pvec, lru_deactivate_file_fn, NULL);

activate_page_drain(cpu);
}

/**
- * deactivate_page - forcefully deactivate a page
+ * deactivate_file_page - forcefully deactivate a file page
* @page: page to deactivate
*
* This function hints the VM that @page is a good reclaim candidate,
* for example if its invalidation fails due to the page being dirty
* or under writeback.
*/
-void deactivate_page(struct page *page)
+void deactivate_file_page(struct page *page)
{
/*
* In a workload with many unevictable page such as mprotect, unevictable
@@ -836,11 +836,11 @@ void deactivate_page(struct page *page)
return;

if (likely(get_page_unless_zero(page))) {
- struct pagevec *pvec = &get_cpu_var(lru_deactivate_pvecs);
+ struct pagevec *pvec = &get_cpu_var(lru_deactivate_file_pvecs);

if (!pagevec_add(pvec, page))
- pagevec_lru_move_fn(pvec, lru_deactivate_fn, NULL);
- put_cpu_var(lru_deactivate_pvecs);
+ pagevec_lru_move_fn(pvec, lru_deactivate_file_fn, NULL);
+ put_cpu_var(lru_deactivate_file_pvecs);
}
}

@@ -872,7 +872,7 @@ void lru_add_drain_all(void)

if (pagevec_count(&per_cpu(lru_add_pvec, cpu)) ||
pagevec_count(&per_cpu(lru_rotate_pvecs, cpu)) ||
- pagevec_count(&per_cpu(lru_deactivate_pvecs, cpu)) ||
+ pagevec_count(&per_cpu(lru_deactivate_file_pvecs, cpu)) ||
need_activate_page_drain(cpu)) {
INIT_WORK(work, lru_add_drain_per_cpu);
schedule_work_on(cpu, work);
diff --git a/mm/truncate.c b/mm/truncate.c
index 7a9d8a3..66af903 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -490,7 +490,7 @@ unsigned long invalidate_mapping_pages(struct address_space *mapping,
* of interest and try to speed up its reclaim.
*/
if (!ret)
- deactivate_page(page);
+ deactivate_file_page(page);
count += ret;
}
pagevec_remove_exceptionals(&pvec);
--
1.9.3