open_slab
if (slab == allocator->open_slab)
slab->allocator->open_slab = slab;
if (allocator->open_slab != NULL) {
result = allocate_slab_block(allocator->open_slab, block_number_ptr);
prioritize_slab(allocator->open_slab);
open_slab(list_entry(vdo_priority_table_dequeue(allocator->prioritized_slabs),
return allocate_slab_block(allocator->open_slab, block_number_ptr);
allocator->open_slab = NULL;
struct vdo_slab *open_slab;