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| author | Christoph Lameter <clameter@sgi.com> | 2006-09-25 23:31:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-26 08:48:46 -0700 |
| commit | fb0e7942bdcbbd2f90e61cb4cfa4fa892a873f8a (patch) | |
| tree | 71344e9afafbd631f4ac010bc8c48e0b16737299 /mm/page_alloc.c | |
| parent | 2f1b6248682f8b39ca3c7e549dfc216d26c4109b (diff) | |
| download | lwn-fb0e7942bdcbbd2f90e61cb4cfa4fa892a873f8a.tar.gz lwn-fb0e7942bdcbbd2f90e61cb4cfa4fa892a873f8a.zip | |
[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.c | 6 |
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; |