[PATCH 3/8] mm/percpu: Update the code comment when creating new chunk

Baoquan He
2022-10-24T08:15:02Z

The lock pcpu_alloc_mutex taking code has been moved to the beginning of
pcpu_allo() if it's non atomic allocation. So the code comment above
above pcpu_create_chunk() callsite need be updated.

Signed-off-by: Baoquan He <bhe@redhat.com>
---
mm/percpu.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index a3fde4ac03a4..a8121302a79c 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1817,16 +1817,12 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved,

spin_unlock_irqrestore(&pcpu_lock, flags);

- /*
- * No space left. Create a new chunk. We don't want multiple
- * tasks to create chunks simultaneously. Serialize and create iff
- * there's still no empty chunk after grabbing the mutex.
- */
if (is_atomic) {
err = "atomic alloc failed, no space left";
goto fail;
}

+ /* No space left. Create a new chunk. */
if (list_empty(&pcpu_chunk_lists[pcpu_free_slot])) {
chunk = pcpu_create_chunk(pcpu_gfp);
if (!chunk) {
--
2.34.1