[PATCH v19 10/20] mm/swap.c: fold vm event PGROTATED into pagevec_move_tail_fn
From: Alex Shi
Date: Wed Sep 23 2020 - 23:29:25 EST
Fold the PGROTATED event collection into pagevec_move_tail_fn call back
func like other funcs does in pagevec_lru_move_fn. Thus we could save
func call pagevec_move_tail().
Now all usage of pagevec_lru_move_fn are same and no needs of its 3rd
parameter.
It's just simply the calling. No functional change.
[lkp@xxxxxxxxx: found a build issue in the original patch, thanks]
Signed-off-by: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx>
Acked-by: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
---
mm/swap.c | 65 ++++++++++++++++++++++-----------------------------------------
1 file changed, 23 insertions(+), 42 deletions(-)
diff --git a/mm/swap.c b/mm/swap.c
index 1bc2fc5d8b7c..4e33873975a6 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -204,8 +204,7 @@ int get_kernel_page(unsigned long start, int write, struct page **pages)
EXPORT_SYMBOL_GPL(get_kernel_page);
static void pagevec_lru_move_fn(struct pagevec *pvec,
- void (*move_fn)(struct page *page, struct lruvec *lruvec, void *arg),
- void *arg)
+ void (*move_fn)(struct page *page, struct lruvec *lruvec))
{
int i;
struct pglist_data *pgdat = NULL;
@@ -224,7 +223,7 @@ static void pagevec_lru_move_fn(struct pagevec *pvec,
}
lruvec = mem_cgroup_page_lruvec(page, pgdat);
- (*move_fn)(page, lruvec, arg);
+ (*move_fn)(page, lruvec);
}
if (pgdat)
spin_unlock_irqrestore(&pgdat->lru_lock, flags);
@@ -232,35 +231,22 @@ static void pagevec_lru_move_fn(struct pagevec *pvec,
pagevec_reinit(pvec);
}
-static void pagevec_move_tail_fn(struct page *page, struct lruvec *lruvec,
- void *arg)
+static void pagevec_move_tail_fn(struct page *page, struct lruvec *lruvec)
{
- int *pgmoved = arg;
-
if (PageLRU(page) && !PageUnevictable(page)) {
del_page_from_lru_list(page, lruvec, page_lru(page));
ClearPageActive(page);
add_page_to_lru_list_tail(page, lruvec, page_lru(page));
- (*pgmoved) += thp_nr_pages(page);
+ __count_vm_events(PGROTATED, thp_nr_pages(page));
}
}
/*
- * pagevec_move_tail() must be called with IRQ disabled.
- * Otherwise this may cause nasty races.
- */
-static void pagevec_move_tail(struct pagevec *pvec)
-{
- int pgmoved = 0;
-
- pagevec_lru_move_fn(pvec, pagevec_move_tail_fn, &pgmoved);
- __count_vm_events(PGROTATED, pgmoved);
-}
-
-/*
* Writeback is about to end against a page which has been marked for immediate
* reclaim. If it still appears to be reclaimable, move it to the tail of the
* inactive list.
+ *
+ * rotate_reclaimable_page() must disable IRQs, to prevent nasty races.
*/
void rotate_reclaimable_page(struct page *page)
{
@@ -273,7 +259,7 @@ void rotate_reclaimable_page(struct page *page)
local_lock_irqsave(&lru_rotate.lock, flags);
pvec = this_cpu_ptr(&lru_rotate.pvec);
if (!pagevec_add(pvec, page) || PageCompound(page))
- pagevec_move_tail(pvec);
+ pagevec_lru_move_fn(pvec, pagevec_move_tail_fn);
local_unlock_irqrestore(&lru_rotate.lock, flags);
}
}
@@ -315,8 +301,7 @@ void lru_note_cost_page(struct page *page)
page_is_file_lru(page), thp_nr_pages(page));
}
-static void __activate_page(struct page *page, struct lruvec *lruvec,
- void *arg)
+static void __activate_page(struct page *page, struct lruvec *lruvec)
{
if (PageLRU(page) && !PageActive(page) && !PageUnevictable(page)) {
int lru = page_lru_base_type(page);
@@ -340,7 +325,7 @@ static void activate_page_drain(int cpu)
struct pagevec *pvec = &per_cpu(lru_pvecs.activate_page, cpu);
if (pagevec_count(pvec))
- pagevec_lru_move_fn(pvec, __activate_page, NULL);
+ pagevec_lru_move_fn(pvec, __activate_page);
}
static bool need_activate_page_drain(int cpu)
@@ -358,7 +343,7 @@ void activate_page(struct page *page)
pvec = this_cpu_ptr(&lru_pvecs.activate_page);
get_page(page);
if (!pagevec_add(pvec, page) || PageCompound(page))
- pagevec_lru_move_fn(pvec, __activate_page, NULL);
+ pagevec_lru_move_fn(pvec, __activate_page);
local_unlock(&lru_pvecs.lock);
}
}
@@ -374,7 +359,7 @@ void activate_page(struct page *page)
page = compound_head(page);
spin_lock_irq(&pgdat->lru_lock);
- __activate_page(page, mem_cgroup_page_lruvec(page, pgdat), NULL);
+ __activate_page(page, mem_cgroup_page_lruvec(page, pgdat));
spin_unlock_irq(&pgdat->lru_lock);
}
#endif
@@ -527,8 +512,7 @@ void lru_cache_add_inactive_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_file_fn(struct page *page, struct lruvec *lruvec,
- void *arg)
+static void lru_deactivate_file_fn(struct page *page, struct lruvec *lruvec)
{
int lru;
bool active;
@@ -575,8 +559,7 @@ static void lru_deactivate_file_fn(struct page *page, struct lruvec *lruvec,
}
}
-static void lru_deactivate_fn(struct page *page, struct lruvec *lruvec,
- void *arg)
+static void lru_deactivate_fn(struct page *page, struct lruvec *lruvec)
{
if (PageLRU(page) && PageActive(page) && !PageUnevictable(page)) {
int lru = page_lru_base_type(page);
@@ -593,8 +576,7 @@ static void lru_deactivate_fn(struct page *page, struct lruvec *lruvec,
}
}
-static void lru_lazyfree_fn(struct page *page, struct lruvec *lruvec,
- void *arg)
+static void lru_lazyfree_fn(struct page *page, struct lruvec *lruvec)
{
if (PageLRU(page) && PageAnon(page) && PageSwapBacked(page) &&
!PageSwapCache(page) && !PageUnevictable(page)) {
@@ -638,21 +620,21 @@ void lru_add_drain_cpu(int cpu)
/* No harm done if a racing interrupt already did this */
local_lock_irqsave(&lru_rotate.lock, flags);
- pagevec_move_tail(pvec);
+ pagevec_lru_move_fn(pvec, pagevec_move_tail_fn);
local_unlock_irqrestore(&lru_rotate.lock, flags);
}
pvec = &per_cpu(lru_pvecs.lru_deactivate_file, cpu);
if (pagevec_count(pvec))
- pagevec_lru_move_fn(pvec, lru_deactivate_file_fn, NULL);
+ pagevec_lru_move_fn(pvec, lru_deactivate_file_fn);
pvec = &per_cpu(lru_pvecs.lru_deactivate, cpu);
if (pagevec_count(pvec))
- pagevec_lru_move_fn(pvec, lru_deactivate_fn, NULL);
+ pagevec_lru_move_fn(pvec, lru_deactivate_fn);
pvec = &per_cpu(lru_pvecs.lru_lazyfree, cpu);
if (pagevec_count(pvec))
- pagevec_lru_move_fn(pvec, lru_lazyfree_fn, NULL);
+ pagevec_lru_move_fn(pvec, lru_lazyfree_fn);
activate_page_drain(cpu);
}
@@ -681,7 +663,7 @@ void deactivate_file_page(struct page *page)
pvec = this_cpu_ptr(&lru_pvecs.lru_deactivate_file);
if (!pagevec_add(pvec, page) || PageCompound(page))
- pagevec_lru_move_fn(pvec, lru_deactivate_file_fn, NULL);
+ pagevec_lru_move_fn(pvec, lru_deactivate_file_fn);
local_unlock(&lru_pvecs.lock);
}
}
@@ -703,7 +685,7 @@ void deactivate_page(struct page *page)
pvec = this_cpu_ptr(&lru_pvecs.lru_deactivate);
get_page(page);
if (!pagevec_add(pvec, page) || PageCompound(page))
- pagevec_lru_move_fn(pvec, lru_deactivate_fn, NULL);
+ pagevec_lru_move_fn(pvec, lru_deactivate_fn);
local_unlock(&lru_pvecs.lock);
}
}
@@ -725,7 +707,7 @@ void mark_page_lazyfree(struct page *page)
pvec = this_cpu_ptr(&lru_pvecs.lru_lazyfree);
get_page(page);
if (!pagevec_add(pvec, page) || PageCompound(page))
- pagevec_lru_move_fn(pvec, lru_lazyfree_fn, NULL);
+ pagevec_lru_move_fn(pvec, lru_lazyfree_fn);
local_unlock(&lru_pvecs.lock);
}
}
@@ -935,8 +917,7 @@ void __pagevec_release(struct pagevec *pvec)
}
EXPORT_SYMBOL(__pagevec_release);
-static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec,
- void *arg)
+static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec)
{
enum lru_list lru;
int was_unevictable = TestClearPageUnevictable(page);
@@ -995,7 +976,7 @@ static void __pagevec_lru_add_fn(struct page *page, struct lruvec *lruvec,
*/
void __pagevec_lru_add(struct pagevec *pvec)
{
- pagevec_lru_move_fn(pvec, __pagevec_lru_add_fn, NULL);
+ pagevec_lru_move_fn(pvec, __pagevec_lru_add_fn);
}
/**
--
1.8.3.1