percpu: fix starting offset for chunk statistics traversal

This patch fixes the starting offset used when scanning chunks to
compute the chunk statistics. The value start_offset (and end_offset)
are managed in bytes while the traversal occurs over bits. Thus for the
reserved and dynamic chunk, it may incorrectly skip over the initial
allocations.

Signed-off-by: Dennis Zhou <dennisszhou@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>

diff --git a/mm/percpu-stats.c b/mm/percpu-stats.c
index 6142484e88f79c3e946b30de136a2886c075ffe7..7a58460bfd27a303c7ab4d3c4f10abac02c15603 100644 (file)
--- a/mm/percpu-stats.c
+++ b/mm/percpu-stats.c
@@ -73,7 +73,7 @@ static void chunk_map_stats(struct seq_file *m, struct pcpu_chunk *chunk,
                     last_alloc + 1 : 0;
 
        as_len = 0;
-       start = chunk->start_offset;
+       start = chunk->start_offset / PCPU_MIN_ALLOC_SIZE;
 
        /*
         * If a bit is set in the allocation map, the bound_map identifies