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| author |   Christoph Lameter <clameter@sgi.com> | 2007-02-10 01:43:10 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 10:51:18 -0800 |
| commit | 4b51d66989218aad731a721b5b28c79bf5388c09 (patch) | |
| tree | 8ff7acbd219f699c20c2f1fd201ffb3db5a64062 /mm/page_alloc.c | |
| parent | [PATCH] optional ZONE_DMA: introduce CONFIG_ZONE_DMA (diff) | |
| download | linux-dev-4b51d66989218aad731a721b5b28c79bf5388c09.tar.xz linux-dev-4b51d66989218aad731a721b5b28c79bf5388c09.zip | |
[PATCH] optional ZONE_DMA: optional ZONE_DMA in the VM
Make ZONE_DMA optional in core code.
- ifdef all code for ZONE_DMA and related definitions following the example
for ZONE_DMA32 and ZONE_HIGHMEM.
- Without ZONE_DMA, ZONE_HIGHMEM and ZONE_DMA32 we get to a ZONES_SHIFT of
0.
- Modify the VM statistics to work correctly without a DMA zone.
- Modify slab to not create DMA slabs if there is no ZONE_DMA.
[akpm@osdl.org: cleanup]
[jdike@addtoit.com: build fix]
[apw@shadowen.org: Simplify calculation of the number of bits we need for ZONES_SHIFT]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Matthew Wilcox <willy@debian.org>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 6cff13840c6d..d461b23a27a1 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -73,7 +73,9 @@ static void __free_pages_ok(struct page *page, unsigned int order); * don't need any ZONE_NORMAL reservation */ int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = { +#ifdef CONFIG_ZONE_DMA 256, +#endif #ifdef CONFIG_ZONE_DMA32 256, #endif @@ -85,7 +87,9 @@ int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES-1] = { EXPORT_SYMBOL(totalram_pages); static char * const zone_names[MAX_NR_ZONES] = { +#ifdef CONFIG_ZONE_DMA "DMA", +#endif #ifdef CONFIG_ZONE_DMA32 "DMA32", #endif |