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| author | Eric Dumazet <dada1@cosmosbay.com> | 2008-02-06 01:37:01 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-06 10:41:04 -0800 |
| commit | b3242151906372f30f57feaa43b4cac96a23edb1 (patch) | |
| tree | d258219aa13dfeae8d9fb5db1fd220a0664a680d | |
| parent | e7ca2d41a029577a8cff453d1445951d4f96bfd8 (diff) | |
| download | linux-b3242151906372f30f57feaa43b4cac96a23edb1.tar.gz linux-b3242151906372f30f57feaa43b4cac96a23edb1.tar.bz2 linux-b3242151906372f30f57feaa43b4cac96a23edb1.zip | |
PERCPU : __percpu_alloc_mask() can dynamically size percpu_data storage
Instead of allocating a fix sized array of NR_CPUS pointers for percpu_data,
we can use nr_cpu_ids, which is generally < NR_CPUS.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/percpu.h | 2 | ||||
| -rw-r--r-- | mm/allocpercpu.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/percpu.h b/include/linux/percpu.h index 50faa0ea28e4..1ac969724bb2 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -54,7 +54,7 @@ #ifdef CONFIG_SMP struct percpu_data { - void *ptrs[NR_CPUS]; + void *ptrs[1]; }; #define __percpu_disguise(pdata) (struct percpu_data *)~(unsigned long)(pdata) diff --git a/mm/allocpercpu.c b/mm/allocpercpu.c index 00b02623f008..7e58322b7134 100644 --- a/mm/allocpercpu.c +++ b/mm/allocpercpu.c @@ -98,7 +98,7 @@ EXPORT_SYMBOL_GPL(__percpu_populate_mask); */ void *__percpu_alloc_mask(size_t size, gfp_t gfp, cpumask_t *mask) { - void *pdata = kzalloc(sizeof(struct percpu_data), gfp); + void *pdata = kzalloc(nr_cpu_ids * sizeof(void *), gfp); void *__pdata = __percpu_disguise(pdata); if (unlikely(!pdata)) |