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Message-Id: <20210622121551.3398730-38-willy@infradead.org>
Date: Tue, 22 Jun 2021 13:15:42 +0100
From: "Matthew Wilcox (Oracle)" <willy@...radead.org>
To: akpm@...ux-foundation.org
Cc: "Matthew Wilcox (Oracle)" <willy@...radead.org>,
linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v2 37/46] mm/workingset: Convert workingset_refault() to take a folio
This nets us 178 bytes of savings from removing calls to compound_head.
The three callers all grow a little, but each of them will be converted
to use folios soon, so that's fine.
Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>
---
include/linux/swap.h | 4 ++--
mm/filemap.c | 2 +-
mm/memory.c | 3 ++-
mm/swap.c | 6 +++---
mm/swap_state.c | 2 +-
mm/workingset.c | 34 +++++++++++++++++-----------------
6 files changed, 26 insertions(+), 25 deletions(-)
diff --git a/include/linux/swap.h b/include/linux/swap.h
index d1cb67cdb476..35d3dba422a8 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -323,7 +323,7 @@ static inline swp_entry_t folio_swap_entry(struct folio *folio)
/* linux/mm/workingset.c */
void workingset_age_nonresident(struct lruvec *lruvec, unsigned long nr_pages);
void *workingset_eviction(struct page *page, struct mem_cgroup *target_memcg);
-void workingset_refault(struct page *page, void *shadow);
+void workingset_refault(struct folio *folio, void *shadow);
void workingset_activation(struct folio *folio);
/* Only track the nodes of mappings with shadow entries */
@@ -344,7 +344,7 @@ extern unsigned long nr_free_buffer_pages(void);
/* linux/mm/swap.c */
extern void lru_note_cost(struct lruvec *lruvec, bool file,
unsigned int nr_pages);
-extern void lru_note_cost_page(struct page *);
+extern void lru_note_cost_folio(struct folio *);
extern void lru_cache_add(struct page *);
void mark_page_accessed(struct page *);
void folio_mark_accessed(struct folio *);
diff --git a/mm/filemap.c b/mm/filemap.c
index dd360721c72b..673094ce67da 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -981,7 +981,7 @@ int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
*/
WARN_ON_ONCE(PageActive(page));
if (!(gfp_mask & __GFP_WRITE) && shadow)
- workingset_refault(page, shadow);
+ workingset_refault(page_folio(page), shadow);
lru_cache_add(page);
}
return ret;
diff --git a/mm/memory.c b/mm/memory.c
index a8f0ddd9e84a..d37f0f898f65 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3364,7 +3364,8 @@ vm_fault_t do_swap_page(struct vm_fault *vmf)
shadow = get_shadow_from_swap_cache(entry);
if (shadow)
- workingset_refault(page, shadow);
+ workingset_refault(page_folio(page),
+ shadow);
lru_cache_add(page);
diff --git a/mm/swap.c b/mm/swap.c
index 53422f6b7db1..2ed00cfd03ac 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -313,10 +313,10 @@ void lru_note_cost(struct lruvec *lruvec, bool file, unsigned int nr_pages)
} while ((lruvec = parent_lruvec(lruvec)));
}
-void lru_note_cost_page(struct page *page)
+void lru_note_cost_folio(struct folio *folio)
{
- lru_note_cost(mem_cgroup_page_lruvec(page, page_pgdat(page)),
- page_is_file_lru(page), thp_nr_pages(page));
+ lru_note_cost(mem_cgroup_folio_lruvec(folio),
+ folio_is_file_lru(folio), folio_nr_pages(folio));
}
static void __folio_activate(struct folio *folio, struct lruvec *lruvec)
diff --git a/mm/swap_state.c b/mm/swap_state.c
index 272ea2108c9d..1c8e8b3aa10b 100644
--- a/mm/swap_state.c
+++ b/mm/swap_state.c
@@ -503,7 +503,7 @@ struct page *__read_swap_cache_async(swp_entry_t entry, gfp_t gfp_mask,
mem_cgroup_swapin_uncharge_swap(entry);
if (shadow)
- workingset_refault(page, shadow);
+ workingset_refault(page_folio(page), shadow);
/* Caller will initiate read into locked page */
lru_cache_add(page);
diff --git a/mm/workingset.c b/mm/workingset.c
index 37cdcda96afd..2c8f211daafe 100644
--- a/mm/workingset.c
+++ b/mm/workingset.c
@@ -271,17 +271,17 @@ void *workingset_eviction(struct page *page, struct mem_cgroup *target_memcg)
}
/**
- * workingset_refault - evaluate the refault of a previously evicted page
- * @page: the freshly allocated replacement page
- * @shadow: shadow entry of the evicted page
+ * workingset_refault - evaluate the refault of a previously evicted folio
+ * @page: the freshly allocated replacement folio
+ * @shadow: shadow entry of the evicted folio
*
* Calculates and evaluates the refault distance of the previously
- * evicted page in the context of the node and the memcg whose memory
+ * evicted folio in the context of the node and the memcg whose memory
* pressure caused the eviction.
*/
-void workingset_refault(struct page *page, void *shadow)
+void workingset_refault(struct folio *folio, void *shadow)
{
- bool file = page_is_file_lru(page);
+ bool file = folio_is_file_lru(folio);
struct mem_cgroup *eviction_memcg;
struct lruvec *eviction_lruvec;
unsigned long refault_distance;
@@ -299,10 +299,10 @@ void workingset_refault(struct page *page, void *shadow)
rcu_read_lock();
/*
* Look up the memcg associated with the stored ID. It might
- * have been deleted since the page's eviction.
+ * have been deleted since the folio's eviction.
*
* Note that in rare events the ID could have been recycled
- * for a new cgroup that refaults a shared page. This is
+ * for a new cgroup that refaults a shared folio. This is
* impossible to tell from the available data. However, this
* should be a rare and limited disturbance, and activations
* are always speculative anyway. Ultimately, it's the aging
@@ -338,14 +338,14 @@ void workingset_refault(struct page *page, void *shadow)
refault_distance = (refault - eviction) & EVICTION_MASK;
/*
- * The activation decision for this page is made at the level
+ * The activation decision for this folio is made at the level
* where the eviction occurred, as that is where the LRU order
- * during page reclaim is being determined.
+ * during folio reclaim is being determined.
*
- * However, the cgroup that will own the page is the one that
+ * However, the cgroup that will own the folio is the one that
* is actually experiencing the refault event.
*/
- memcg = page_memcg(page);
+ memcg = folio_memcg(folio);
lruvec = mem_cgroup_lruvec(memcg, pgdat);
inc_lruvec_state(lruvec, WORKINGSET_REFAULT_BASE + file);
@@ -373,15 +373,15 @@ void workingset_refault(struct page *page, void *shadow)
if (refault_distance > workingset_size)
goto out;
- SetPageActive(page);
- workingset_age_nonresident(lruvec, thp_nr_pages(page));
+ folio_set_active_flag(folio);
+ workingset_age_nonresident(lruvec, folio_nr_pages(folio));
inc_lruvec_state(lruvec, WORKINGSET_ACTIVATE_BASE + file);
- /* Page was active prior to eviction */
+ /* Folio was active prior to eviction */
if (workingset) {
- SetPageWorkingset(page);
+ folio_set_workingset_flag(folio);
/* XXX: Move to lru_cache_add() when it supports new vs putback */
- lru_note_cost_page(page);
+ lru_note_cost_folio(folio);
inc_lruvec_state(lruvec, WORKINGSET_RESTORE_BASE + file);
}
out:
--
2.30.2
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