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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>
This commit is contained in:
Miaohe Lin 2022-04-28 23:16:05 -07:00 committed by akpm
parent a3148b5fea
commit 5e36c25b2c
1 changed files with 12 additions and 29 deletions
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37
mm/z3fold.c
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@ -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)
@ -737,14 +739,10 @@ 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 {
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);