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-rw-r--r--mm/z3fold.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/z3fold.c b/mm/z3fold.c
index b2ba2ba585f3..39e19125d6a0 100644
--- a/mm/z3fold.c
+++ b/mm/z3fold.c
@@ -404,8 +404,7 @@ static void do_compact_page(struct z3fold_header *zhdr, bool locked)
WARN_ON(z3fold_page_trylock(zhdr));
else
z3fold_page_lock(zhdr);
- if (test_bit(PAGE_STALE, &page->private) ||
- !test_and_clear_bit(NEEDS_COMPACTING, &page->private)) {
+ if (WARN_ON(!test_and_clear_bit(NEEDS_COMPACTING, &page->private))) {
z3fold_page_unlock(zhdr);
return;
}
@@ -413,6 +412,11 @@ 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);
+ return;
+ }
+
z3fold_compact_page(zhdr);
unbuddied = get_cpu_ptr(pool->unbuddied);
fchunks = num_free_chunks(zhdr);
@@ -753,9 +757,11 @@ static void z3fold_free(struct z3fold_pool *pool, unsigned long handle)
list_del_init(&zhdr->buddy);
spin_unlock(&pool->lock);
zhdr->cpu = -1;
+ kref_get(&zhdr->refcount);
do_compact_page(zhdr, true);
return;
}
+ kref_get(&zhdr->refcount);
queue_work_on(zhdr->cpu, pool->compact_wq, &zhdr->work);
z3fold_page_unlock(zhdr);
}