Messages in this thread Patch in this message | | | From | Jianyu Zhan <> | Subject | [PATCH 1/2] mm/percpu.c: renew the max_contig if we merge the head and previous block. | Date | Thu, 27 Mar 2014 19:05:43 +0800 |
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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@gmail.com> --- 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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