During pcpu_alloc_area(), we might merge the current head with the
previous block. Since we have calculated the max_contig using the
size of previous block before we skip it, and now we update the size
of previous block, so we should renew the max_contig.
Signed-off-by: Jianyu Zhan <nasa4836@xxxxxxxxx>
---
mm/percpu.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/mm/percpu.c b/mm/percpu.c
index 036cfe0..cfda29c 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -506,9 +506,11 @@ static int pcpu_alloc_area(struct pcpu_chunk *chunk, int size, int align)
* uncommon for percpu allocations.
*/
if (head && (head < sizeof(int) || chunk->map[i - 1] > 0)) {
- if (chunk->map[i - 1] > 0)
+ if (chunk->map[i - 1] > 0) {
chunk->map[i - 1] += head;
- else {
+ max_contig =
+ max(chunk->map[i - 1], max_contig);
+ } else {
chunk->map[i - 1] -= head;
chunk->free_size -= head;
}
--
1.8.5.3
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