Messages in this thread Patch in this message | | | Date | Fri, 7 Jul 2006 16:18:51 -0700 (PDT) | From | Christoph Lameter <> | Subject | [PATCH 08/11] Make ZONE_DMA32 optional |
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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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