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authorJan Beulich <JBeulich@novell.com>2009-09-21 17:03:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-22 07:17:38 -0700
commit4481374ce88ba8f460c8b89f2572027bd27057d0 (patch)
tree6896601b6a1da0e3e932ffa75fcff966c834c02c /mm
parent4738e1b9cf8f9e28d7de080a5e6ce5d0095ea18f (diff)
mm: replace various uses of num_physpages by totalram_pages
Sizing of memory allocations shouldn't depend on the number of physical pages found in a system, as that generally includes (perhaps a huge amount of) non-RAM pages. The amount of what actually is usable as storage should instead be used as a basis here. Some of the calculations (i.e. those not intending to use high memory) should likely even use (totalram_pages - totalhigh_pages). Signed-off-by: Jan Beulich <jbeulich@novell.com> Acked-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Ingo Molnar <mingo@elte.hu> Cc: Dave Airlie <airlied@linux.ie> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: "David S. Miller" <davem@davemloft.net> Cc: Patrick McHardy <kaber@trash.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slab.c2
-rw-r--r--mm/swap.c2
-rw-r--r--mm/vmalloc.c4
3 files changed, 4 insertions, 4 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 7b5d4deacfc..7dfa481c96b 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -1384,7 +1384,7 @@ void __init kmem_cache_init(void)
* Fragmentation resistance on low memory - only use bigger
* page orders on machines with more than 32MB of memory.
*/
- if (num_physpages > (32 << 20) >> PAGE_SHIFT)
+ if (totalram_pages > (32 << 20) >> PAGE_SHIFT)
slab_break_gfp_order = BREAK_GFP_ORDER_HI;
/* Bootstrap is tricky, because several objects are allocated
diff --git a/mm/swap.c b/mm/swap.c
index 4a8a59e671f..308e57d8d7e 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -496,7 +496,7 @@ EXPORT_SYMBOL(pagevec_lookup_tag);
*/
void __init swap_setup(void)
{
- unsigned long megs = num_physpages >> (20 - PAGE_SHIFT);
+ unsigned long megs = totalram_pages >> (20 - PAGE_SHIFT);
#ifdef CONFIG_SWAP
bdi_init(swapper_space.backing_dev_info);
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 9216b2555d0..5535da1d696 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1386,7 +1386,7 @@ void *vmap(struct page **pages, unsigned int count,
might_sleep();
- if (count > num_physpages)
+ if (count > totalram_pages)
return NULL;
area = get_vm_area_caller((count << PAGE_SHIFT), flags,
@@ -1493,7 +1493,7 @@ static void *__vmalloc_node(unsigned long size, gfp_t gfp_mask, pgprot_t prot,
unsigned long real_size = size;
size = PAGE_ALIGN(size);
- if (!size || (size >> PAGE_SHIFT) > num_physpages)
+ if (!size || (size >> PAGE_SHIFT) > totalram_pages)
return NULL;
area = __get_vm_area_node(size, VM_ALLOC, VMALLOC_START, VMALLOC_END,