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authorChristoph Lameter <clameter@sgi.com>2007-02-10 01:43:10 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-02-11 10:51:18 -0800
commit4b51d66989218aad731a721b5b28c79bf5388c09 (patch)
tree8ff7acbd219f699c20c2f1fd201ffb3db5a64062 /include/linux/vmstat.h
parent66701b1499a3ff11882c8c4aef36e8eac86e17b1 (diff)
downloadop-kernel-dev-4b51d66989218aad731a721b5b28c79bf5388c09.zip
op-kernel-dev-4b51d66989218aad731a721b5b28c79bf5388c09.tar.gz
[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.h17
1 files changed, 13 insertions, 4 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 77caf91..7ba91f2 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 *);
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