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rcu: Rename *_kfree_callback/*_kfree_rcu_offset/kfree_call_*

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The following changes are introduced:

1. Rename rcu_invoke_kfree_callback() to rcu_invoke_kvfree_callback(),
as well as the associated trace events, so the rcu_kfree_callback(),
becomes rcu_kvfree_callback(). The reason is to be aligned with kvfree()
notation.

2. Rename __is_kfree_rcu_offset to __is_kvfree_rcu_offset. All RCU
paths use kvfree() now instead of kfree(), thus rename it.

3. Rename kfree_call_rcu() to the kvfree_call_rcu(). The reason is,
it is capable of freeing vmalloc() memory now. Do the same with
__kfree_rcu() macro, it becomes __kvfree_rcu(), the goal is the
same.

Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Co-developed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Uladzislau Rezki (Sony)
2020-05-25 23:47:55 +02:00
committed by Paul E. McKenney
parent 64d1d06ccb
commit c408b215f5
6 changed files with 23 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
kernel/rcu/tree.c
View File

@@ -2905,8 +2905,8 @@ __call_rcu(struct rcu_head *head, rcu_callback_t func)
return; // Enqueued onto ->nocb_bypass, so just leave.
// If no-CBs CPU gets here, rcu_nocb_try_bypass() acquired ->nocb_lock.
rcu_segcblist_enqueue(&rdp->cblist, head);
if (__is_kfree_rcu_offset((unsigned long)func))
trace_rcu_kfree_callback(rcu_state.name, head,
if (__is_kvfree_rcu_offset((unsigned long)func))
trace_rcu_kvfree_callback(rcu_state.name, head,
(unsigned long)func,
rcu_segcblist_n_cbs(&rdp->cblist));
else
@@ -3146,7 +3146,7 @@ static void kfree_rcu_work(struct work_struct *work)
bkvhead[i]->records);
} else { // vmalloc() / vfree().
for (j = 0; j < bkvhead[i]->nr_records; j++) {
trace_rcu_invoke_kfree_callback(
trace_rcu_invoke_kvfree_callback(
rcu_state.name,
bkvhead[i]->records[j], 0);
@@ -3179,9 +3179,9 @@ static void kfree_rcu_work(struct work_struct *work)
next = head->next;
debug_rcu_head_unqueue((struct rcu_head *)ptr);
rcu_lock_acquire(&rcu_callback_map);
trace_rcu_invoke_kfree_callback(rcu_state.name, head, offset);
trace_rcu_invoke_kvfree_callback(rcu_state.name, head, offset);
if (!WARN_ON_ONCE(!__is_kfree_rcu_offset(offset)))
if (!WARN_ON_ONCE(!__is_kvfree_rcu_offset(offset)))
kvfree(ptr);
rcu_lock_release(&rcu_callback_map);
@@ -3344,12 +3344,12 @@ kvfree_call_rcu_add_ptr_to_bulk(struct kfree_rcu_cpu *krcp, void *ptr)
* one, that is used only when the main path can not be maintained temporary,
* due to memory pressure.
*
* Each kfree_call_rcu() request is added to a batch. The batch will be drained
* Each kvfree_call_rcu() request is added to a batch. The batch will be drained
* every KFREE_DRAIN_JIFFIES number of jiffies. All the objects in the batch will
* be free'd in workqueue context. This allows us to: batch requests together to
* reduce the number of grace periods during heavy kfree_rcu()/kvfree_rcu() load.
*/
void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
void kvfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
{
unsigned long flags;
struct kfree_rcu_cpu *krcp;
@@ -3388,7 +3388,7 @@ void kfree_call_rcu(struct rcu_head *head, rcu_callback_t func)
unlock_return:
krc_this_cpu_unlock(krcp, flags);
}
EXPORT_SYMBOL_GPL(kfree_call_rcu);
EXPORT_SYMBOL_GPL(kvfree_call_rcu);
static unsigned long
kfree_rcu_shrink_count(struct shrinker *shrink, struct shrink_control *sc)