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| author | Christoph Lameter <clameter@sgi.com> | 2007-02-10 12:43:10 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-02-11 21:51:18 +0300 |
| commit | 4b51d66989218aad731a721b5b28c79bf5388c09 (patch) | |
| tree | 8ff7acbd219f699c20c2f1fd201ffb3db5a64062 /include/linux/vmstat.h | |
| parent | 66701b1499a3ff11882c8c4aef36e8eac86e17b1 (diff) | |
| download | linux-4b51d66989218aad731a721b5b28c79bf5388c09.tar.xz | |
[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 'include/linux/vmstat.h')
| -rw-r--r-- | include/linux/vmstat.h | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h index 77caf911969c..7ba91f2839fa 100644 --- a/include/linux/vmstat.h +++ b/include/linux/vmstat.h @@ -19,6 +19,12 @@ * generated will simply be the increment of a global address. */ +#ifdef CONFIG_ZONE_DMA +#define DMA_ZONE(xx) xx##_DMA, +#else +#define DMA_ZONE(xx) +#endif + #ifdef CONFIG_ZONE_DMA32 #define DMA32_ZONE(xx) xx##_DMA32, #else @@ -31,7 +37,7 @@ #define HIGHMEM_ZONE(xx) #endif -#define FOR_ALL_ZONES(xx) xx##_DMA, DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) +#define FOR_ALL_ZONES(xx) DMA_ZONE(xx) DMA32_ZONE(xx) xx##_NORMAL HIGHMEM_ZONE(xx) enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT, FOR_ALL_ZONES(PGALLOC), @@ -96,7 +102,8 @@ static inline void vm_events_fold_cpu(int cpu) #endif /* CONFIG_VM_EVENT_COUNTERS */ #define __count_zone_vm_events(item, zone, delta) \ - __count_vm_events(item##_DMA + zone_idx(zone), delta) + __count_vm_events(item##_NORMAL - ZONE_NORMAL + \ + zone_idx(zone), delta) /* * Zone based page accounting with per cpu differentials. @@ -143,14 +150,16 @@ static inline unsigned long node_page_state(int node, struct zone *zones = NODE_DATA(node)->node_zones; return +#ifdef CONFIG_ZONE_DMA + zone_page_state(&zones[ZONE_DMA], item) + +#endif #ifdef CONFIG_ZONE_DMA32 zone_page_state(&zones[ZONE_DMA32], item) + #endif - zone_page_state(&zones[ZONE_NORMAL], item) + #ifdef CONFIG_HIGHMEM zone_page_state(&zones[ZONE_HIGHMEM], item) + #endif - zone_page_state(&zones[ZONE_DMA], item); + zone_page_state(&zones[ZONE_NORMAL], item); } extern void zone_statistics(struct zonelist *, struct zone *); |