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authorDave Hansen <haveblue@us.ibm.com>2005-06-23 00:07:37 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-23 09:45:00 -0700
commit408fde81c1bff15c875a3618481e93a01dcc79ea (patch)
tree89b173c5cccd69a17aa64bff8916c54bdcb2d6fe /arch/alpha/mm/numa.c
parent29c31a3bf257e0723423f1f0f9afd1b840434c75 (diff)
downloadlinux-408fde81c1bff15c875a3618481e93a01dcc79ea.tar.gz
[PATCH] remove non-DISCONTIG use of pgdat->node_mem_map
This patch effectively eliminates direct use of pgdat->node_mem_map outside of the DISCONTIG code. On a flat memory system, these fields aren't currently used, neither are they on a sparsemem system. There was also a node_mem_map(nid) macro on many architectures. Its use along with the use of ->node_mem_map itself was not consistent. It has been removed in favor of two new, more explicit, arch-independent macros: pgdat_page_nr(pgdat, pagenr) nid_page_nr(nid, pagenr) I called them "pgdat" and "nid" because we overload the term "node" to mean "NUMA node", "DISCONTIG node" or "pg_data_t" in very confusing ways. I believe the newer names are much clearer. These macros can be overridden in the sparsemem case with a theoretically slower operation using node_start_pfn and pfn_to_page(), instead. We could make this the only behavior if people want, but I don't want to change too much at once. One thing at a time. This patch removes more code than it adds. Compile tested on alpha, alpha discontig, arm, arm-discontig, i386, i386 generic, NUMAQ, Summit, ppc64, ppc64 discontig, and x86_64. Full list here: http://sr71.net/patches/2.6.12/2.6.12-rc1-mhp2/configs/ Boot tested on NUMAQ, x86 SMP and ppc64 power4/5 LPARs. Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Martin J. Bligh <mbligh@aracnet.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/alpha/mm/numa.c')
-rw-r--r--arch/alpha/mm/numa.c16
1 files changed, 7 insertions, 9 deletions
diff --git a/arch/alpha/mm/numa.c b/arch/alpha/mm/numa.c
index ba81c4422aaf..c7481d59b6df 100644
--- a/arch/alpha/mm/numa.c
+++ b/arch/alpha/mm/numa.c
@@ -327,8 +327,6 @@ void __init mem_init(void)
extern char _text, _etext, _data, _edata;
extern char __init_begin, __init_end;
unsigned long nid, i;
- struct page * lmem_map;
-
high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
reservedpages = 0;
@@ -338,10 +336,10 @@ void __init mem_init(void)
*/
totalram_pages += free_all_bootmem_node(NODE_DATA(nid));
- lmem_map = node_mem_map(nid);
pfn = NODE_DATA(nid)->node_start_pfn;
for (i = 0; i < node_spanned_pages(nid); i++, pfn++)
- if (page_is_ram(pfn) && PageReserved(lmem_map+i))
+ if (page_is_ram(pfn) &&
+ PageReserved(nid_page_nr(nid, i)))
reservedpages++;
}
@@ -373,18 +371,18 @@ show_mem(void)
show_free_areas();
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
for_each_online_node(nid) {
- struct page * lmem_map = node_mem_map(nid);
i = node_spanned_pages(nid);
while (i-- > 0) {
+ struct page *page = nid_page_nr(nid, i);
total++;
- if (PageReserved(lmem_map+i))
+ if (PageReserved(page))
reserved++;
- else if (PageSwapCache(lmem_map+i))
+ else if (PageSwapCache(page))
cached++;
- else if (!page_count(lmem_map+i))
+ else if (!page_count(page))
free++;
else
- shared += page_count(lmem_map + i) - 1;
+ shared += page_count(page) - 1;
}
}
printk("%ld pages of RAM\n",total);