memcg_expand_one_shrinker_map

Name:memcg_expand_one_shrinker_map

Proto:static int memcg_expand_one_shrinker_map(struct mem_cgroup *memcg, int size, int old_size)

Type:int

Parameter:

Type	Parameter	Name
struct mem_cgroup *	memcg
int	size
int	old_size

328

lockdep_assert_held( & memcg_shrinker_map_mutex)

330

for_each_node(nid)

331

old = cu_dereference_protected() - fetch RCU pointer when updates prevented*@p: The pointer to read, prior to dereferencing*@c: The conditions under which the dereference will take place* Return the value of the specified RCU-protected pointer, but omit(shrinker_map, true)

334

If Not old Then Return 0

337

new = kvmalloc( size of new + size, GFP_KERNEL)

338

If Not new Then Return -ENOMEM

342

memset(map, (int)0xff, old_size)

343

memset((void * )map + old_size, 0, size - old_size)

345

cu_assign_pointer() - assign to RCU-protected pointer*@p: pointer to assign to*@v: value to assign (publish)* Assigns the specified value to the specified RCU-protected* pointer, ensuring that any concurrent RCU readers will see* any prior initialization(shrinker_map, new)

346

Post an RCU callback to be invoked after the end of an RCU grace* period. But since we have but one CPU, that would be after any* quiescent state.

349

Return 0

**Caller**
Name	Describe
memcg_expand_shrinker_maps

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion