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 | Fri, 28 Mar 2014 20:55:21 +0800 |
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Hi, tj, I've reworked the patches on top of percpu/for-3.15.
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 | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/percpu.c b/mm/percpu.c index 202e104..63e24fb 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -473,9 +473,11 @@ static int pcpu_alloc_area(struct pcpu_chunk *chunk, int size, int align) * uncommon for percpu allocations. */ if (head && (head < sizeof(int) || !(p[-1] & 1))) { + *p = off += head; if (p[-1] & 1) chunk->free_size -= head; - *p = off += head; + else + max_contig = max(*p - p[-1], max_contig); this_size -= head; head = 0; } -- 1.8.5.3
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