From: Christoph Lameter <clameter@sgi.com>
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org
Subject: [10/11] vcompound: Fallback for zone wait table
Date: Tue, 29 Apr 2008 21:43:01 -0700 [thread overview]
Message-ID: <20080430044321.245211049@sgi.com> (raw)
In-Reply-To: <20080430044251.266380837@sgi.com>
[-- Attachment #1: vcp_waittable_support --]
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Currently vmalloc may be used for allocating zone wait table.
Use a virtualizable compound page request in order to be able to use
a physically contiguous page that can then use the large kernel TLBs.
Drawback: The zone wait table is rounded up to the next power of two which
may cost some memory.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
mm/page_alloc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
Index: linux-2.6.25-rc8-mm2/mm/page_alloc.c
===================================================================
--- linux-2.6.25-rc8-mm2.orig/mm/page_alloc.c 2008-04-11 20:20:44.000000000 -0700
+++ linux-2.6.25-rc8-mm2/mm/page_alloc.c 2008-04-11 20:23:36.000000000 -0700
@@ -2884,7 +2884,8 @@ int zone_wait_table_init(struct zone *zo
* To use this new node's memory, further consideration will be
* necessary.
*/
- zone->wait_table = vmalloc(alloc_size);
+ zone->wait_table = __alloc_vcompound(GFP_KERNEL,
+ get_order(alloc_size));
}
if (!zone->wait_table)
return -ENOMEM;
--
--
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next prev parent reply other threads:[~2008-04-30 4:43 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-30 4:42 [00/11] Virtualizable Compound Page Support V5 Christoph Lameter
2008-04-30 4:42 ` [01/11] vmalloc: Return page array on vunmap Christoph Lameter
2008-04-30 4:42 ` [02/11] vcompound: pageflags: Add PageVcompound() Christoph Lameter
2008-04-30 4:42 ` [03/11] vmallocinfo: Support display of virtualized compound pages Christoph Lameter
2008-04-30 4:42 ` [04/11] vcompound: Core piece for virtualizable compound page allocation Christoph Lameter
2008-04-30 4:42 ` [05/11] vcompound: Debugging aid Christoph Lameter
2008-04-30 4:42 ` [06/11] sparsemem: Use virtualizable compound page Christoph Lameter
2008-04-30 4:42 ` [07/11] vcompound: bit waitqueue support Christoph Lameter
2008-04-30 4:42 ` [08/11] crypto: Use virtualizable compounds for temporary order 2 allocation Christoph Lameter
2008-04-30 4:43 ` [09/11] slub: Use virtualizable compound for buffer Christoph Lameter
2008-04-30 4:43 ` Christoph Lameter [this message]
2008-04-30 4:43 ` [11/11] e1000: Avoid vmalloc through virtualizable compound page Christoph Lameter
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