mm/swap: rename lru_pvecs to cpu_fbatches
No change to generated code, but this struct no longer contains any pagevecs, and not all the folio batches it contains are lru. Link: https://lkml.kernel.org/r/20220617175020.717127-10-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)
akpm
Родитель
3a44610b12
Коммит
82ac64d86f
90
mm/swap.c
90
mm/swap.c
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@ -56,10 +56,10 @@ static DEFINE_PER_CPU(struct lru_rotate, lru_rotate) = {
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};
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/*
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* The following struct pagevec are grouped together because they are protected
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* The following folio batches are grouped together because they are protected
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* by disabling preemption (and interrupts remain enabled).
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*/
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struct lru_pvecs {
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struct cpu_fbatches {
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local_lock_t lock;
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struct folio_batch lru_add;
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struct folio_batch lru_deactivate_file;
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@ -69,7 +69,7 @@ struct lru_pvecs {
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struct folio_batch activate;
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#endif
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};
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static DEFINE_PER_CPU(struct lru_pvecs, lru_pvecs) = {
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static DEFINE_PER_CPU(struct cpu_fbatches, cpu_fbatches) = {
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.lock = INIT_LOCAL_LOCK(lock),
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};
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@ -361,7 +361,7 @@ static void folio_activate_fn(struct lruvec *lruvec, struct folio *folio)
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#ifdef CONFIG_SMP
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static void folio_activate_drain(int cpu)
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{
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struct folio_batch *fbatch = &per_cpu(lru_pvecs.activate, cpu);
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struct folio_batch *fbatch = &per_cpu(cpu_fbatches.activate, cpu);
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if (folio_batch_count(fbatch))
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folio_batch_move_lru(fbatch, folio_activate_fn);
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@ -374,10 +374,10 @@ static void folio_activate(struct folio *folio)
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struct folio_batch *fbatch;
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folio_get(folio);
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local_lock(&lru_pvecs.lock);
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fbatch = this_cpu_ptr(&lru_pvecs.activate);
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local_lock(&cpu_fbatches.lock);
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fbatch = this_cpu_ptr(&cpu_fbatches.activate);
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folio_batch_add_and_move(fbatch, folio, folio_activate_fn);
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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}
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}
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@ -404,8 +404,8 @@ static void __lru_cache_activate_folio(struct folio *folio)
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struct folio_batch *fbatch;
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int i;
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local_lock(&lru_pvecs.lock);
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fbatch = this_cpu_ptr(&lru_pvecs.lru_add);
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local_lock(&cpu_fbatches.lock);
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fbatch = this_cpu_ptr(&cpu_fbatches.lru_add);
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/*
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* Search backwards on the optimistic assumption that the folio being
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@ -426,7 +426,7 @@ static void __lru_cache_activate_folio(struct folio *folio)
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}
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}
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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}
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/*
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@ -452,7 +452,7 @@ void folio_mark_accessed(struct folio *folio)
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} else if (!folio_test_active(folio)) {
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/*
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* If the folio is on the LRU, queue it for activation via
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* lru_pvecs.activate. Otherwise, assume the folio is in a
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* cpu_fbatches.activate. Otherwise, assume the folio is in a
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* folio_batch, mark it active and it'll be moved to the active
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* LRU on the next drain.
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*/
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@ -474,7 +474,7 @@ EXPORT_SYMBOL(folio_mark_accessed);
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*
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* Queue the folio for addition to the LRU. The decision on whether
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* to add the page to the [in]active [file|anon] list is deferred until the
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* pagevec is drained. This gives a chance for the caller of folio_add_lru()
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* folio_batch is drained. This gives a chance for the caller of folio_add_lru()
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* have the folio added to the active list using folio_mark_accessed().
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*/
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void folio_add_lru(struct folio *folio)
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@ -486,10 +486,10 @@ void folio_add_lru(struct folio *folio)
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VM_BUG_ON_FOLIO(folio_test_lru(folio), folio);
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folio_get(folio);
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local_lock(&lru_pvecs.lock);
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fbatch = this_cpu_ptr(&lru_pvecs.lru_add);
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local_lock(&cpu_fbatches.lock);
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fbatch = this_cpu_ptr(&cpu_fbatches.lru_add);
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folio_batch_add_and_move(fbatch, folio, lru_add_fn);
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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}
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EXPORT_SYMBOL(folio_add_lru);
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@ -614,13 +614,13 @@ static void lru_lazyfree_fn(struct lruvec *lruvec, struct folio *folio)
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}
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/*
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* Drain pages out of the cpu's pagevecs.
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* Drain pages out of the cpu's folio_batch.
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* Either "cpu" is the current CPU, and preemption has already been
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* disabled; or "cpu" is being hot-unplugged, and is already dead.
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*/
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void lru_add_drain_cpu(int cpu)
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{
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struct folio_batch *fbatch = &per_cpu(lru_pvecs.lru_add, cpu);
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struct folio_batch *fbatch = &per_cpu(cpu_fbatches.lru_add, cpu);
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if (folio_batch_count(fbatch))
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folio_batch_move_lru(fbatch, lru_add_fn);
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@ -636,15 +636,15 @@ void lru_add_drain_cpu(int cpu)
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local_unlock_irqrestore(&lru_rotate.lock, flags);
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}
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fbatch = &per_cpu(lru_pvecs.lru_deactivate_file, cpu);
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fbatch = &per_cpu(cpu_fbatches.lru_deactivate_file, cpu);
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if (folio_batch_count(fbatch))
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folio_batch_move_lru(fbatch, lru_deactivate_file_fn);
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fbatch = &per_cpu(lru_pvecs.lru_deactivate, cpu);
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fbatch = &per_cpu(cpu_fbatches.lru_deactivate, cpu);
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if (folio_batch_count(fbatch))
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folio_batch_move_lru(fbatch, lru_deactivate_fn);
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fbatch = &per_cpu(lru_pvecs.lru_lazyfree, cpu);
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fbatch = &per_cpu(cpu_fbatches.lru_lazyfree, cpu);
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if (folio_batch_count(fbatch))
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folio_batch_move_lru(fbatch, lru_lazyfree_fn);
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@ -670,10 +670,10 @@ void deactivate_file_folio(struct folio *folio)
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return;
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folio_get(folio);
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local_lock(&lru_pvecs.lock);
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fbatch = this_cpu_ptr(&lru_pvecs.lru_deactivate_file);
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local_lock(&cpu_fbatches.lock);
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fbatch = this_cpu_ptr(&cpu_fbatches.lru_deactivate_file);
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folio_batch_add_and_move(fbatch, folio, lru_deactivate_file_fn);
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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}
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/*
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@ -693,10 +693,10 @@ void deactivate_page(struct page *page)
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struct folio_batch *fbatch;
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folio_get(folio);
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local_lock(&lru_pvecs.lock);
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fbatch = this_cpu_ptr(&lru_pvecs.lru_deactivate);
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local_lock(&cpu_fbatches.lock);
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fbatch = this_cpu_ptr(&cpu_fbatches.lru_deactivate);
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folio_batch_add_and_move(fbatch, folio, lru_deactivate_fn);
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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}
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}
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@ -717,18 +717,18 @@ void mark_page_lazyfree(struct page *page)
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struct folio_batch *fbatch;
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folio_get(folio);
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local_lock(&lru_pvecs.lock);
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fbatch = this_cpu_ptr(&lru_pvecs.lru_lazyfree);
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local_lock(&cpu_fbatches.lock);
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fbatch = this_cpu_ptr(&cpu_fbatches.lru_lazyfree);
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folio_batch_add_and_move(fbatch, folio, lru_lazyfree_fn);
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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}
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}
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void lru_add_drain(void)
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{
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local_lock(&lru_pvecs.lock);
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local_lock(&cpu_fbatches.lock);
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lru_add_drain_cpu(smp_processor_id());
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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mlock_page_drain_local();
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}
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@ -740,19 +740,19 @@ void lru_add_drain(void)
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*/
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static void lru_add_and_bh_lrus_drain(void)
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{
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local_lock(&lru_pvecs.lock);
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local_lock(&cpu_fbatches.lock);
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lru_add_drain_cpu(smp_processor_id());
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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invalidate_bh_lrus_cpu();
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mlock_page_drain_local();
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}
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void lru_add_drain_cpu_zone(struct zone *zone)
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{
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local_lock(&lru_pvecs.lock);
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local_lock(&cpu_fbatches.lock);
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lru_add_drain_cpu(smp_processor_id());
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drain_local_pages(zone);
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local_unlock(&lru_pvecs.lock);
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local_unlock(&cpu_fbatches.lock);
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mlock_page_drain_local();
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}
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@ -797,8 +797,9 @@ static inline void __lru_add_drain_all(bool force_all_cpus)
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return;
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/*
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* Guarantee pagevec counter stores visible by this CPU are visible to
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* other CPUs before loading the current drain generation.
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* Guarantee folio_batch counter stores visible by this CPU
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* are visible to other CPUs before loading the current drain
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* generation.
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*/
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smp_mb();
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@ -824,8 +825,9 @@ static inline void __lru_add_drain_all(bool force_all_cpus)
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* (D) Increment global generation number
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*
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* Pairs with smp_load_acquire() at (B), outside of the critical
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* section. Use a full memory barrier to guarantee that the new global
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* drain generation number is stored before loading pagevec counters.
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* section. Use a full memory barrier to guarantee that the
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* new global drain generation number is stored before loading
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* folio_batch counters.
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*
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* This pairing must be done here, before the for_each_online_cpu loop
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* below which drains the page vectors.
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@ -847,12 +849,12 @@ static inline void __lru_add_drain_all(bool force_all_cpus)
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for_each_online_cpu(cpu) {
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struct work_struct *work = &per_cpu(lru_add_drain_work, cpu);
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if (folio_batch_count(&per_cpu(lru_pvecs.lru_add, cpu)) ||
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if (folio_batch_count(&per_cpu(cpu_fbatches.lru_add, cpu)) ||
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data_race(folio_batch_count(&per_cpu(lru_rotate.fbatch, cpu))) ||
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folio_batch_count(&per_cpu(lru_pvecs.lru_deactivate_file, cpu)) ||
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folio_batch_count(&per_cpu(lru_pvecs.lru_deactivate, cpu)) ||
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folio_batch_count(&per_cpu(lru_pvecs.lru_lazyfree, cpu)) ||
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folio_batch_count(&per_cpu(lru_pvecs.activate, cpu)) ||
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folio_batch_count(&per_cpu(cpu_fbatches.lru_deactivate_file, cpu)) ||
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folio_batch_count(&per_cpu(cpu_fbatches.lru_deactivate, cpu)) ||
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folio_batch_count(&per_cpu(cpu_fbatches.lru_lazyfree, cpu)) ||
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folio_batch_count(&per_cpu(cpu_fbatches.activate, cpu)) ||
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need_mlock_page_drain(cpu) ||
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has_bh_in_lru(cpu, NULL)) {
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INIT_WORK(work, lru_add_drain_per_cpu);
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