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| author | Jianyu Zhan <nasa4836@gmail.com> | 2014-03-28 20:55:21 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2014-03-29 09:29:42 -0400 |
| commit | 21ddfd38ee9aac804d22beaceed4c7b903cca234 (patch) | |
| tree | a4d853bdc3b274be013aa97d6378acbf2f995d88 /mm/percpu.c | |
| parent | 2f69fa829cb4ca062aaffee9ab9eb44484db75b1 (diff) | |
| download | lwn-21ddfd38ee9aac804d22beaceed4c7b903cca234.tar.gz lwn-21ddfd38ee9aac804d22beaceed4c7b903cca234.zip | |
percpu: renew the max_contig if we merge the head and previous block
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>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/percpu.c')
| -rw-r--r-- | mm/percpu.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/percpu.c b/mm/percpu.c index 202e104df8a7..63e24fb4387b 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; } |