From: Christoph Lameter <clameter@sgi.com>
To: linux-kernel@vger.kernel.org
Cc: akpm@osdl.org, Hugh Dickins <hugh@veritas.com>,
Christoph Hellwig <hch@infradead.org>,
Con Kolivas <kernel@kolivas.org>,
Marcelo Tosatti <marcelo@kvack.org>,
Arjan van de Ven <arjan@infradead.org>,
Nick Piggin <nickpiggin@yahoo.com.au>,
Christoph Lameter <clameter@sgi.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Andi Kleen <ak@suse.de>
Subject: [PATCH 08/11] Make ZONE_DMA32 optional
Date: Fri, 7 Jul 2006 16:18:51 -0700 (PDT) [thread overview]
Message-ID: <20060707231851.3790.26405.sendpatchset@schroedinger.engr.sgi.com> (raw)
In-Reply-To: <20060707231810.3790.19313.sendpatchset@schroedinger.engr.sgi.com>
Make ZONE_DMA32 optional
- Add #ifdefs around ZONE_DMA32 specific code and definitions.
- Add CONFIG_ZONE_DMA32 config option and use that for x86_64
that alone needs this zone.
- Remove the use of CONFIG_DMA_IS_DMA32 and CONFIG_DMA_IS_NORMAL
for ia64 and fix up the way per node ZVCs are calculated.
- Fall back to prior GFP_ZONEMASK of 0x03 if there is no
DMA32 zone.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Index: linux-2.6.17-mm6/mm/page_alloc.c
===================================================================
--- linux-2.6.17-mm6.orig/mm/page_alloc.c 2006-07-07 15:07:44.654814230 -0700
+++ linux-2.6.17-mm6/mm/page_alloc.c 2006-07-07 15:07:48.160457319 -0700
@@ -70,7 +70,9 @@ static void __free_pages_ok(struct page
*/
int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = {
256,
+#ifdef CONFIG_ZONE_DMA32
256,
+#endif
32
};
@@ -85,7 +87,9 @@ EXPORT_SYMBOL(zone_table);
static char *zone_names[MAX_NR_ZONES] = {
"DMA",
+#ifdef CONFIG_ZONE_DMA32
"DMA32",
+#endif
"Normal",
"HighMem"
};
@@ -1471,8 +1475,10 @@ static inline int highest_zone(int zone_
int res = ZONE_NORMAL;
if (zone_bits & (__force int)__GFP_HIGHMEM)
res = ZONE_HIGHMEM;
+#ifdef CONFIG_ZONE_DMA32
if (zone_bits & (__force int)__GFP_DMA32)
res = ZONE_DMA32;
+#endif
if (zone_bits & (__force int)__GFP_DMA)
res = ZONE_DMA;
return res;
Index: linux-2.6.17-mm6/include/linux/mmzone.h
===================================================================
--- linux-2.6.17-mm6.orig/include/linux/mmzone.h 2006-07-07 15:07:44.652861225 -0700
+++ linux-2.6.17-mm6/include/linux/mmzone.h 2006-07-07 15:07:48.161433821 -0700
@@ -108,12 +108,14 @@ typedef enum {
* <16M.
*/
ZONE_DMA,
+#ifdef CONFIG_ZONE_DMA32
/*
* x86_64 needs two ZONE_DMAs because it supports devices that are
* only able to do DMA to the lower 16M but also 32 bit devices that
* can only do DMA areas below 4G.
*/
ZONE_DMA32,
+#endif
/*
* Normal addressable memory is in ZONE_NORMAL. DMA operations can be
* performed on pages in ZONE_NORMAL if the DMA devices support
@@ -160,9 +162,13 @@ typedef enum {
*
* NOTE! Make sure this matches the zones in <linux/gfp.h>
*/
-#define GFP_ZONEMASK 0x07
-/* #define GFP_ZONETYPES (GFP_ZONEMASK + 1) */ /* Non-loner */
-#define GFP_ZONETYPES ((GFP_ZONEMASK + 1) / 2 + 1) /* Loner */
+#define GFP_ZONETYPES ((GFP_ZONEMASK + 1) / 2 + 1) /* Loner */
+
+#ifdef CONFIG_ZONE_DMA32
+#define GFP_ZONEMASK 0x07
+#else
+#define GFP_ZONEMASK 0x03
+#endif
struct zone {
/* Fields commonly accessed by the page allocator */
@@ -434,7 +440,11 @@ static inline int is_normal(struct zone
static inline int is_dma32(struct zone *zone)
{
+#ifdef CONFIG_ZONE_DMA32
return zone == zone->zone_pgdat->node_zones + ZONE_DMA32;
+#else
+ return 0;
+#endif
}
static inline int is_dma(struct zone *zone)
Index: linux-2.6.17-mm6/include/linux/gfp.h
===================================================================
--- linux-2.6.17-mm6.orig/include/linux/gfp.h 2006-07-03 13:47:21.552673977 -0700
+++ linux-2.6.17-mm6/include/linux/gfp.h 2006-07-07 15:07:48.199517409 -0700
@@ -13,7 +13,7 @@ struct vm_area_struct;
/* Zone modifiers in GFP_ZONEMASK (see linux/mmzone.h - low three bits) */
#define __GFP_DMA ((__force gfp_t)0x01u)
#define __GFP_HIGHMEM ((__force gfp_t)0x02u)
-#ifdef CONFIG_DMA_IS_DMA32
+#ifndef CONFIG_ZONE_DMA32
#define __GFP_DMA32 ((__force gfp_t)0x01) /* ZONE_DMA is ZONE_DMA32 */
#elif BITS_PER_LONG < 64
#define __GFP_DMA32 ((__force gfp_t)0x00) /* ZONE_NORMAL is ZONE_DMA32 */
Index: linux-2.6.17-mm6/include/linux/vmstat.h
===================================================================
--- linux-2.6.17-mm6.orig/include/linux/vmstat.h 2006-07-03 13:47:22.185447343 -0700
+++ linux-2.6.17-mm6/include/linux/vmstat.h 2006-07-07 15:07:48.210258933 -0700
@@ -124,12 +124,10 @@ static inline unsigned long node_page_st
struct zone *zones = NODE_DATA(node)->node_zones;
return
-#ifndef CONFIG_DMA_IS_NORMAL
-#if !defined(CONFIG_DMA_IS_DMA32) && BITS_PER_LONG >= 64
+#ifdef CONFIG_ZONE_DMA32
zone_page_state(&zones[ZONE_DMA32], item) +
#endif
zone_page_state(&zones[ZONE_NORMAL], item) +
-#endif
#ifdef CONFIG_HIGHMEM
zone_page_state(&zones[ZONE_HIGHMEM], item) +
#endif
Index: linux-2.6.17-mm6/arch/ia64/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/ia64/Kconfig 2006-07-03 13:47:12.766108010 -0700
+++ linux-2.6.17-mm6/arch/ia64/Kconfig 2006-07-07 15:07:48.218070952 -0700
@@ -66,15 +66,6 @@ config IA64_UNCACHED_ALLOCATOR
bool
select GENERIC_ALLOCATOR
-config DMA_IS_DMA32
- bool
- default y
-
-config DMA_IS_NORMAL
- bool
- depends on IA64_SGI_SN2
- default y
-
choice
prompt "System type"
default IA64_GENERIC
Index: linux-2.6.17-mm6/arch/x86_64/Kconfig
===================================================================
--- linux-2.6.17-mm6.orig/arch/x86_64/Kconfig 2006-07-03 13:47:14.227931665 -0700
+++ linux-2.6.17-mm6/arch/x86_64/Kconfig 2006-07-07 15:07:48.240530503 -0700
@@ -24,6 +24,10 @@ config X86
bool
default y
+config ZONE_DMA32
+ bool
+ default y
+
config LOCKDEP_SUPPORT
bool
default y
next prev parent reply other threads:[~2006-07-07 23:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-07 23:18 [PATCH 00/11] Reduce MAX_NR_ZONES V1 Christoph Lameter
2006-07-07 23:18 ` [PATCH 01/11] swap_prefetch: Remove incorrect use of ZONE_HIGHMEM Christoph Lameter
2006-07-07 23:18 ` [PATCH 02/11] Remove two strange uses of MAX_NR_ZONES Christoph Lameter
2006-07-07 23:18 ` [PATCH 03/11] Fix MAX_NR_ZONES array initializations Christoph Lameter
2006-07-07 23:18 ` [PATCH 04/11] Make display of highmem counters conditional on CONFIG_HIGHMEM Christoph Lameter
2006-07-07 23:18 ` [PATCH 05/11] Move HIGHMEM counters into highmem.c/.h Christoph Lameter
2006-07-07 23:18 ` [PATCH 06/11] Page allocator ZONE_HIGHMEM cleanup Christoph Lameter
2006-07-07 23:18 ` [PATCH 07/11] Use enum to define zones, reformat and comment Christoph Lameter
2006-07-08 0:56 ` Andrew Morton
2006-07-07 23:18 ` Christoph Lameter [this message]
2006-07-07 23:18 ` [PATCH 09/11] Make ZONE_HIGHMEM optional Christoph Lameter
2006-07-07 23:19 ` [PATCH 10/11] Remove display of counters for unconfigured zones Christoph Lameter
2006-07-07 23:19 ` [PATCH 11/11] Fix i386 SRAT check for MAX_NR_ZONES Christoph Lameter
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