diff options
author | Matthew Wilcox (Oracle) | 2022-06-17 18:50:07 +0100 |
---|---|---|
committer | akpm | 2022-07-03 18:08:46 -0700 |
commit | 82ac64d86fb079431e3af618a074e77be398299b (patch) | |
tree | 783fb41126ca5fc3016fa9a89fd179bbd417fbcc | |
parent | 3a44610b126399021095b4495941926a7dd756c4 (diff) |
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>
-rw-r--r-- | mm/swap.c | 90 |
1 files changed, 46 insertions, 44 deletions
diff --git a/mm/swap.c b/mm/swap.c index 3f402d351ad5..01e4e9c7d7a3 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -56,10 +56,10 @@ static DEFINE_PER_CPU(struct lru_rotate, lru_rotate) = { }; /* - * The following struct pagevec are grouped together because they are protected + * The following folio batches are grouped together because they are protected * by disabling preemption (and interrupts remain enabled). */ -struct lru_pvecs { +struct cpu_fbatches { local_lock_t lock; struct folio_batch lru_add; struct folio_batch lru_deactivate_file; @@ -69,7 +69,7 @@ struct lru_pvecs { struct folio_batch activate; #endif }; -static DEFINE_PER_CPU(struct lru_pvecs, lru_pvecs) = { +static DEFINE_PER_CPU(struct cpu_fbatches, cpu_fbatches) = { .lock = INIT_LOCAL_LOCK(lock), }; @@ -361,7 +361,7 @@ static void folio_activate_fn(struct lruvec *lruvec, struct folio *folio) #ifdef CONFIG_SMP static void folio_activate_drain(int cpu) { - struct folio_batch *fbatch = &per_cpu(lru_pvecs.activate, cpu); + struct folio_batch *fbatch = &per_cpu(cpu_fbatches.activate, cpu); if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, folio_activate_fn); @@ -374,10 +374,10 @@ static void folio_activate(struct folio *folio) struct folio_batch *fbatch; folio_get(folio); - local_lock(&lru_pvecs.lock); - fbatch = this_cpu_ptr(&lru_pvecs.activate); + local_lock(&cpu_fbatches.lock); + fbatch = this_cpu_ptr(&cpu_fbatches.activate); folio_batch_add_and_move(fbatch, folio, folio_activate_fn); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); } } @@ -404,8 +404,8 @@ static void __lru_cache_activate_folio(struct folio *folio) struct folio_batch *fbatch; int i; - local_lock(&lru_pvecs.lock); - fbatch = this_cpu_ptr(&lru_pvecs.lru_add); + local_lock(&cpu_fbatches.lock); + fbatch = this_cpu_ptr(&cpu_fbatches.lru_add); /* * Search backwards on the optimistic assumption that the folio being @@ -426,7 +426,7 @@ static void __lru_cache_activate_folio(struct folio *folio) } } - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); } /* @@ -452,7 +452,7 @@ void folio_mark_accessed(struct folio *folio) } else if (!folio_test_active(folio)) { /* * If the folio is on the LRU, queue it for activation via - * lru_pvecs.activate. Otherwise, assume the folio is in a + * cpu_fbatches.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. */ @@ -474,7 +474,7 @@ EXPORT_SYMBOL(folio_mark_accessed); * * Queue the folio for addition to the LRU. The decision on whether * to add the page to the [in]active [file|anon] list is deferred until the - * pagevec is drained. This gives a chance for the caller of folio_add_lru() + * folio_batch is drained. This gives a chance for the caller of folio_add_lru() * have the folio added to the active list using folio_mark_accessed(). */ void folio_add_lru(struct folio *folio) @@ -486,10 +486,10 @@ void folio_add_lru(struct folio *folio) VM_BUG_ON_FOLIO(folio_test_lru(folio), folio); folio_get(folio); - local_lock(&lru_pvecs.lock); - fbatch = this_cpu_ptr(&lru_pvecs.lru_add); + local_lock(&cpu_fbatches.lock); + fbatch = this_cpu_ptr(&cpu_fbatches.lru_add); folio_batch_add_and_move(fbatch, folio, lru_add_fn); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); } EXPORT_SYMBOL(folio_add_lru); @@ -614,13 +614,13 @@ static void lru_lazyfree_fn(struct lruvec *lruvec, struct folio *folio) } /* - * Drain pages out of the cpu's pagevecs. + * Drain pages out of the cpu's folio_batch. * Either "cpu" is the current CPU, and preemption has already been * disabled; or "cpu" is being hot-unplugged, and is already dead. */ void lru_add_drain_cpu(int cpu) { - struct folio_batch *fbatch = &per_cpu(lru_pvecs.lru_add, cpu); + struct folio_batch *fbatch = &per_cpu(cpu_fbatches.lru_add, cpu); if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_add_fn); @@ -636,15 +636,15 @@ void lru_add_drain_cpu(int cpu) local_unlock_irqrestore(&lru_rotate.lock, flags); } - fbatch = &per_cpu(lru_pvecs.lru_deactivate_file, cpu); + fbatch = &per_cpu(cpu_fbatches.lru_deactivate_file, cpu); if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_deactivate_file_fn); - fbatch = &per_cpu(lru_pvecs.lru_deactivate, cpu); + fbatch = &per_cpu(cpu_fbatches.lru_deactivate, cpu); if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_deactivate_fn); - fbatch = &per_cpu(lru_pvecs.lru_lazyfree, cpu); + fbatch = &per_cpu(cpu_fbatches.lru_lazyfree, cpu); if (folio_batch_count(fbatch)) folio_batch_move_lru(fbatch, lru_lazyfree_fn); @@ -670,10 +670,10 @@ void deactivate_file_folio(struct folio *folio) return; folio_get(folio); - local_lock(&lru_pvecs.lock); - fbatch = this_cpu_ptr(&lru_pvecs.lru_deactivate_file); + local_lock(&cpu_fbatches.lock); + fbatch = this_cpu_ptr(&cpu_fbatches.lru_deactivate_file); folio_batch_add_and_move(fbatch, folio, lru_deactivate_file_fn); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); } /* @@ -693,10 +693,10 @@ void deactivate_page(struct page *page) struct folio_batch *fbatch; folio_get(folio); - local_lock(&lru_pvecs.lock); - fbatch = this_cpu_ptr(&lru_pvecs.lru_deactivate); + local_lock(&cpu_fbatches.lock); + fbatch = this_cpu_ptr(&cpu_fbatches.lru_deactivate); folio_batch_add_and_move(fbatch, folio, lru_deactivate_fn); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); } } @@ -717,18 +717,18 @@ void mark_page_lazyfree(struct page *page) struct folio_batch *fbatch; folio_get(folio); - local_lock(&lru_pvecs.lock); - fbatch = this_cpu_ptr(&lru_pvecs.lru_lazyfree); + local_lock(&cpu_fbatches.lock); + fbatch = this_cpu_ptr(&cpu_fbatches.lru_lazyfree); folio_batch_add_and_move(fbatch, folio, lru_lazyfree_fn); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); } } void lru_add_drain(void) { - local_lock(&lru_pvecs.lock); + local_lock(&cpu_fbatches.lock); lru_add_drain_cpu(smp_processor_id()); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); mlock_page_drain_local(); } @@ -740,19 +740,19 @@ void lru_add_drain(void) */ static void lru_add_and_bh_lrus_drain(void) { - local_lock(&lru_pvecs.lock); + local_lock(&cpu_fbatches.lock); lru_add_drain_cpu(smp_processor_id()); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); invalidate_bh_lrus_cpu(); mlock_page_drain_local(); } void lru_add_drain_cpu_zone(struct zone *zone) { - local_lock(&lru_pvecs.lock); + local_lock(&cpu_fbatches.lock); lru_add_drain_cpu(smp_processor_id()); drain_local_pages(zone); - local_unlock(&lru_pvecs.lock); + local_unlock(&cpu_fbatches.lock); mlock_page_drain_local(); } @@ -797,8 +797,9 @@ static inline void __lru_add_drain_all(bool force_all_cpus) return; /* - * Guarantee pagevec counter stores visible by this CPU are visible to - * other CPUs before loading the current drain generation. + * Guarantee folio_batch counter stores visible by this CPU + * are visible to other CPUs before loading the current drain + * generation. */ smp_mb(); @@ -824,8 +825,9 @@ static inline void __lru_add_drain_all(bool force_all_cpus) * (D) Increment global generation number * * Pairs with smp_load_acquire() at (B), outside of the critical - * section. Use a full memory barrier to guarantee that the new global - * drain generation number is stored before loading pagevec counters. + * section. Use a full memory barrier to guarantee that the + * new global drain generation number is stored before loading + * folio_batch counters. * * This pairing must be done here, before the for_each_online_cpu loop * below which drains the page vectors. @@ -847,12 +849,12 @@ static inline void __lru_add_drain_all(bool force_all_cpus) for_each_online_cpu(cpu) { struct work_struct *work = &per_cpu(lru_add_drain_work, cpu); - if (folio_batch_count(&per_cpu(lru_pvecs.lru_add, cpu)) || + if (folio_batch_count(&per_cpu(cpu_fbatches.lru_add, cpu)) || data_race(folio_batch_count(&per_cpu(lru_rotate.fbatch, cpu))) || - 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)) || - folio_batch_count(&per_cpu(lru_pvecs.activate, cpu)) || + folio_batch_count(&per_cpu(cpu_fbatches.lru_deactivate_file, cpu)) || + folio_batch_count(&per_cpu(cpu_fbatches.lru_deactivate, cpu)) || + folio_batch_count(&per_cpu(cpu_fbatches.lru_lazyfree, cpu)) || + folio_batch_count(&per_cpu(cpu_fbatches.activate, cpu)) || need_mlock_page_drain(cpu) || has_bh_in_lru(cpu, NULL)) { INIT_WORK(work, lru_add_drain_per_cpu); |