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Date: Fri, 03 Sep 2010 18:26:09 +0200 From: Tejun Heo <tj@...nel.org> To: Christoph Lameter <cl@...ux.com> CC: Pekka Enberg <penberg@...helsinki.fi>, Stephen Rothwell <sfr@...b.auug.org.au>, linux-next@...r.kernel.org, lkml <linux-kernel@...r.kernel.org> Subject: [PATCH 2/3] percpu: reduce PCPU_MIN_UNIT_SIZE to 32k In preparation of enabling percpu allocator for UP, reduce PCPU_MIN_UNIT_SIZE to 32k. On UP, the first chunk doesn't have to include static percpu variables and chunk size can be smaller which is important as UP percpu allocator will use contiguous kernel memory to populate chunks. PCPU_MIN_UNIT_SIZE also determines the maximum supported allocation size but 32k should still be enough. Signed-off-by: Tejun Heo <tj@...nel.org> --- include/linux/percpu.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/include/linux/percpu.h b/include/linux/percpu.h index 49466b1..fc8130a 100644 --- a/include/linux/percpu.h +++ b/include/linux/percpu.h @@ -42,7 +42,7 @@ #ifdef CONFIG_SMP /* minimum unit size, also is the maximum supported allocation size */ -#define PCPU_MIN_UNIT_SIZE PFN_ALIGN(64 << 10) +#define PCPU_MIN_UNIT_SIZE PFN_ALIGN(32 << 10) /* * Percpu allocator can serve percpu allocations before slab is -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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