[PATCH rfc 4/4] percpu: fix a comment about the chunks ordering

Roman Gushchin
2021-03-24T19:07:34Z

Since the commit 3e54097beb22 ("percpu: manage chunks based on
contig_bits instead of free_bytes") chunks are sorted based on the
size of the biggest continuous free area instead of the total number
of free bytes. Update the corresponding comment to reflect this.

Signed-off-by: Roman Gushchin <guro@fb.com>
---
mm/percpu.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index 148137f0fc0b..08fb6e5d3232 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -99,7 +99,10 @@

#include "percpu-internal.h"

-/* the slots are sorted by free bytes left, 1-31 bytes share the same slot */
+/*
+ * The slots are sorted by the size of the biggest continuous free area.
+ * 1-31 bytes share the same slot.
+ */
#define PCPU_SLOT_BASE_SHIFT 5
/* chunks in slots below this are subject to being sidelined on failed alloc */
#define PCPU_SLOT_FAIL_THRESHOLD 3
--
2.30.2