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Code Issues Releases Wiki Activity

mm/swap: convert activate_page to a folio_batch 

Rename it to just 'activate', saving 696 bytes of text from removals
of compound_page() and the pagevec_lru_move_fn() infrastructure.
Inline need_activate_page_drain() into its only caller.

Link: https://lkml.kernel.org/r/20220617175020.717127-9-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2022-06-17 18:50:06 +01:00 committed by akpm
parent cec394bafa
commit 3a44610b12
1 changed files with 16 additions and 65 deletions
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81
mm/swap.c
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@ -66,7 +66,7 @@ struct lru_pvecs {
struct folio_batch lru_deactivate;
struct folio_batch lru_lazyfree;
#ifdef CONFIG_SMP
struct pagevec activate_page;
struct folio_batch activate;
#endif
};
static DEFINE_PER_CPU(struct lru_pvecs, lru_pvecs) = {
@ -188,44 +188,6 @@ int get_kernel_pages(const struct kvec *kiov, int nr_segs, int write,
}
EXPORT_SYMBOL_GPL(get_kernel_pages);
static void pagevec_lru_move_fn(struct pagevec *pvec,
void (*move_fn)(struct page *page, struct lruvec *lruvec))
{
int i;
struct lruvec *lruvec = NULL;
unsigned long flags = 0;
for (i = 0; i < pagevec_count(pvec); i++) {
struct page *page = pvec->pages[i];
struct folio *folio = page_folio(page);
/* block memcg migration during page moving between lru */
if (!TestClearPageLRU(page))
continue;
lruvec = folio_lruvec_relock_irqsave(folio, lruvec, &flags);
(*move_fn)(page, lruvec);
SetPageLRU(page);
}
if (lruvec)
unlock_page_lruvec_irqrestore(lruvec, flags);
release_pages(pvec->pages, pvec->nr);
pagevec_reinit(pvec);
}
/* return true if pagevec needs to drain */
static bool pagevec_add_and_need_flush(struct pagevec *pvec, struct page *page)
{
bool ret = false;
if (!pagevec_add(pvec, page) || PageCompound(page) ||
lru_cache_disabled())
ret = true;
return ret;
}
typedef void (*move_fn_t)(struct lruvec *lruvec, struct folio *folio);
static void lru_add_fn(struct lruvec *lruvec, struct folio *folio)
@ -380,7 +342,7 @@ void lru_note_cost_folio(struct folio *folio)
folio_nr_pages(folio));
}
static void __folio_activate(struct folio *folio, struct lruvec *lruvec)
static void folio_activate_fn(struct lruvec *lruvec, struct folio *folio)
{
if (!folio_test_active(folio) && !folio_test_unevictable(folio)) {
long nr_pages = folio_nr_pages(folio);
@ -397,41 +359,30 @@ static void __folio_activate(struct folio *folio, struct lruvec *lruvec)
}
#ifdef CONFIG_SMP
static void __activate_page(struct page *page, struct lruvec *lruvec)
static void folio_activate_drain(int cpu)
{
return __folio_activate(page_folio(page), lruvec);
}
struct folio_batch *fbatch = &per_cpu(lru_pvecs.activate, cpu);
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);
}
static bool need_activate_page_drain(int cpu)
{
return pagevec_count(&per_cpu(lru_pvecs.activate_page, cpu)) != 0;
if (folio_batch_count(fbatch))
folio_batch_move_lru(fbatch, folio_activate_fn);
}
static void folio_activate(struct folio *folio)
{
if (folio_test_lru(folio) && !folio_test_active(folio) &&
!folio_test_unevictable(folio)) {
struct pagevec *pvec;
struct folio_batch *fbatch;
folio_get(folio);
local_lock(&lru_pvecs.lock);
pvec = this_cpu_ptr(&lru_pvecs.activate_page);
if (pagevec_add_and_need_flush(pvec, &folio->page))
pagevec_lru_move_fn(pvec, __activate_page);
fbatch = this_cpu_ptr(&lru_pvecs.activate);
folio_batch_add_and_move(fbatch, folio, folio_activate_fn);
local_unlock(&lru_pvecs.lock);
}
}
#else
static inline void activate_page_drain(int cpu)
static inline void folio_activate_drain(int cpu)
{
}
@ -441,7 +392,7 @@ static void folio_activate(struct folio *folio)
if (folio_test_clear_lru(folio)) {
lruvec = folio_lruvec_lock_irq(folio);
__folio_activate(folio, lruvec);
folio_activate_fn(lruvec, folio);
unlock_page_lruvec_irq(lruvec);
folio_set_lru(folio);
}
@ -500,9 +451,9 @@ void folio_mark_accessed(struct folio *folio)
*/
} else if (!folio_test_active(folio)) {
/*
* If the page is on the LRU, queue it for activation via
* lru_pvecs.activate_page. Otherwise, assume the page is on a
* pagevec, mark it active and it'll be moved to the active
* If the folio is on the LRU, queue it for activation via
* lru_pvecs.activate. Otherwise, assume the folio is in a
* folio_batch, mark it active and it'll be moved to the active
* LRU on the next drain.
*/
if (folio_test_lru(folio))
@ -697,7 +648,7 @@ void lru_add_drain_cpu(int cpu)
if (folio_batch_count(fbatch))
folio_batch_move_lru(fbatch, lru_lazyfree_fn);
activate_page_drain(cpu);
folio_activate_drain(cpu);
}
/**
@ -901,7 +852,7 @@ static inline void __lru_add_drain_all(bool force_all_cpus)
folio_batch_count(&per_cpu(lru_pvecs.lru_deactivate_file, cpu)) ||
folio_batch_count(&per_cpu(lru_pvecs.lru_deactivate, cpu)) ||
folio_batch_count(&per_cpu(lru_pvecs.lru_lazyfree, cpu)) ||
need_activate_page_drain(cpu) ||
folio_batch_count(&per_cpu(lru_pvecs.activate, cpu)) ||
need_mlock_page_drain(cpu) ||
has_bh_in_lru(cpu, NULL)) {
INIT_WORK(work, lru_add_drain_per_cpu);