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authorMiaohe Lin <linmiaohe@huawei.com>2022-04-28 23:16:05 -0700
committerakpm <akpm@linux-foundation.org>2022-04-28 23:16:05 -0700
commit5e36c25b2c1aeee16df21d5e4fef22d7ff2b80cf (patch)
treed34a03f89d7aad4218da29d60e94cda13e6c2d32 /mm/z3fold.c
parenta3148b5fea52d86b8d1c2445b09ca1033f29fdf0 (diff)
mm/z3fold: move decrement of pool->pages_nr into __release_z3fold_page()
The z3fold will always do atomic64_dec(&pool->pages_nr) when the __release_z3fold_page() is called. Thus we can move decrement of pool->pages_nr into __release_z3fold_page() to simplify the code. Also we can reduce the size of z3fold.o ~1k. Without this patch: text data bss dec hex filename 15444 1376 8 16828 41bc mm/z3fold.o With this patch: text data bss dec hex filename 15044 1248 8 16300 3fac mm/z3fold.o Link: https://lkml.kernel.org/r/20220308134311.59086-7-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Cc: Vitaly Wool <vitaly.wool@konsulko.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/z3fold.c')
-rw-r--r--mm/z3fold.c41
1 files changed, 12 insertions, 29 deletions
diff --git a/mm/z3fold.c b/mm/z3fold.c
index adc0b3fa4906..18a697f6fe32 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -520,6 +520,8 @@ static void __release_z3fold_page(struct z3fold_header *zhdr, bool locked)
list_add(&zhdr->buddy, &pool->stale);
queue_work(pool->release_wq, &pool->work);
spin_unlock(&pool->stale_lock);
+
+ atomic64_dec(&pool->pages_nr);
}
static void release_z3fold_page(struct kref *ref)
@@ -737,13 +739,9 @@ static struct z3fold_header *compact_single_buddy(struct z3fold_header *zhdr)
return new_zhdr;
out_fail:
- if (new_zhdr) {
- if (kref_put(&new_zhdr->refcount, release_z3fold_page_locked))
- atomic64_dec(&pool->pages_nr);
- else {
- add_to_unbuddied(pool, new_zhdr);
- z3fold_page_unlock(new_zhdr);
- }
+ if (new_zhdr && !kref_put(&new_zhdr->refcount, release_z3fold_page_locked)) {
+ add_to_unbuddied(pool, new_zhdr);
+ z3fold_page_unlock(new_zhdr);
}
return NULL;
@@ -816,10 +814,8 @@ static void do_compact_page(struct z3fold_header *zhdr, bool locked)
list_del_init(&zhdr->buddy);
spin_unlock(&pool->lock);
- if (kref_put(&zhdr->refcount, release_z3fold_page_locked)) {
- atomic64_dec(&pool->pages_nr);
+ if (kref_put(&zhdr->refcount, release_z3fold_page_locked))
return;
- }
if (test_bit(PAGE_STALE, &page->private) ||
test_and_set_bit(PAGE_CLAIMED, &page->private)) {
@@ -829,9 +825,7 @@ static void do_compact_page(struct z3fold_header *zhdr, bool locked)
if (!zhdr->foreign_handles && buddy_single(zhdr) &&
zhdr->mapped_count == 0 && compact_single_buddy(zhdr)) {
- if (kref_put(&zhdr->refcount, release_z3fold_page_locked))
- atomic64_dec(&pool->pages_nr);
- else {
+ if (!kref_put(&zhdr->refcount, release_z3fold_page_locked)) {
clear_bit(PAGE_CLAIMED, &page->private);
z3fold_page_unlock(zhdr);
}
@@ -1089,10 +1083,8 @@ retry:
if (zhdr) {
bud = get_free_buddy(zhdr, chunks);
if (bud == HEADLESS) {
- if (kref_put(&zhdr->refcount,
+ if (!kref_put(&zhdr->refcount,
release_z3fold_page_locked))
- atomic64_dec(&pool->pages_nr);
- else
z3fold_page_unlock(zhdr);
pr_err("No free chunks in unbuddied\n");
WARN_ON(1);
@@ -1239,10 +1231,8 @@ static void z3fold_free(struct z3fold_pool *pool, unsigned long handle)
if (!page_claimed)
free_handle(handle, zhdr);
- if (kref_put(&zhdr->refcount, release_z3fold_page_locked_list)) {
- atomic64_dec(&pool->pages_nr);
+ if (kref_put(&zhdr->refcount, release_z3fold_page_locked_list))
return;
- }
if (page_claimed) {
/* the page has not been claimed by us */
put_z3fold_header(zhdr);
@@ -1353,9 +1343,7 @@ static int z3fold_reclaim_page(struct z3fold_pool *pool, unsigned int retries)
break;
}
if (!z3fold_page_trylock(zhdr)) {
- if (kref_put(&zhdr->refcount,
- release_z3fold_page))
- atomic64_dec(&pool->pages_nr);
+ kref_put(&zhdr->refcount, release_z3fold_page);
zhdr = NULL;
continue; /* can't evict at this point */
}
@@ -1366,10 +1354,8 @@ static int z3fold_reclaim_page(struct z3fold_pool *pool, unsigned int retries)
*/
if (zhdr->foreign_handles ||
test_and_set_bit(PAGE_CLAIMED, &page->private)) {
- if (kref_put(&zhdr->refcount,
+ if (!kref_put(&zhdr->refcount,
release_z3fold_page_locked))
- atomic64_dec(&pool->pages_nr);
- else
z3fold_page_unlock(zhdr);
zhdr = NULL;
continue; /* can't evict such page */
@@ -1447,7 +1433,6 @@ next:
if (kref_put(&zhdr->refcount,
release_z3fold_page_locked)) {
kmem_cache_free(pool->c_handle, slots);
- atomic64_dec(&pool->pages_nr);
return 0;
}
/*
@@ -1669,10 +1654,8 @@ static void z3fold_page_putback(struct page *page)
if (!list_empty(&zhdr->buddy))
list_del_init(&zhdr->buddy);
INIT_LIST_HEAD(&page->lru);
- if (kref_put(&zhdr->refcount, release_z3fold_page_locked)) {
- atomic64_dec(&pool->pages_nr);
+ if (kref_put(&zhdr->refcount, release_z3fold_page_locked))
return;
- }
spin_lock(&pool->lock);
list_add(&page->lru, &pool->lru);
spin_unlock(&pool->lock);