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authorChristoph Lameter <clameter@sgi.com>2006-09-26 10:31:13 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 19:48:46 +0400
commitfb0e7942bdcbbd2f90e61cb4cfa4fa892a873f8a (patch)
tree71344e9afafbd631f4ac010bc8c48e0b16737299 /mm/page_alloc.c
parent2f1b6248682f8b39ca3c7e549dfc216d26c4109b (diff)
downloadlinux-fb0e7942bdcbbd2f90e61cb4cfa4fa892a873f8a.tar.xz
[PATCH] reduce MAX_NR_ZONES: make ZONE_DMA32 optional
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> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2410a3cb1c53..5b5cbb5e1816 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -70,7 +70,9 @@ static void __free_pages_ok(struct page *page, unsigned int order);
*/
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"
};
@@ -1373,8 +1377,10 @@ static inline int highest_zone(int zone_bits)
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;