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[PATCH] remove non-DISCONTIG use of pgdat->node_mem_map

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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>
This commit is contained in:
Dave Hansen 2005-06-23 00:07:37 -07:00 committed by Linus Torvalds
parent 29c31a3bf2
commit 408fde81c1
14 changed files with 28 additions and 36 deletions
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16
arch/alpha/mm/numa.c
View file

@ -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);

2
arch/i386/mm/pgtable.c
View file

@ -36,7 +36,7 @@ void show_mem(void)
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
for_each_pgdat(pgdat) {
for (i = 0; i < pgdat->node_spanned_pages; ++i) {
page = pgdat->node_mem_map + i;
page = pgdat_page_nr(pgdat, i);
total++;
if (PageHighMem(page))
highmem++;

9
arch/ia64/mm/discontig.c
View file

@ -560,14 +560,15 @@ void show_mem(void)
int shared = 0, cached = 0, reserved = 0;
printk("Node ID: %d\n", pgdat->node_id);
for(i = 0; i < pgdat->node_spanned_pages; i++) {
struct page *page = pgdat_page_nr(pgdat, i);
if (!ia64_pfn_valid(pgdat->node_start_pfn+i))
continue;
if (PageReserved(pgdat->node_mem_map+i))
if (PageReserved(page))
reserved++;
else if (PageSwapCache(pgdat->node_mem_map+i))
else if (PageSwapCache(page))
cached++;
else if (page_count(pgdat->node_mem_map+i))
shared += page_count(pgdat->node_mem_map+i)-1;
else if (page_count(page))
shared += page_count(page)-1;
}
total_present += present;
total_reserved += reserved;

4
arch/m32r/mm/init.c
View file

@ -49,7 +49,7 @@ void show_mem(void)
printk("Free swap: %6ldkB\n",nr_swap_pages<<(PAGE_SHIFT-10));
for_each_pgdat(pgdat) {
for (i = 0; i < pgdat->node_spanned_pages; ++i) {
page = pgdat->node_mem_map + i;
page = pgdat_page_nr(pgdat, i);
total++;
if (PageHighMem(page))
highmem++;
@ -152,7 +152,7 @@ int __init reservedpages_count(void)
reservedpages = 0;
for_each_online_node(nid)
for (i = 0 ; i < MAX_LOW_PFN(nid) - START_PFN(nid) ; i++)
if (PageReserved(NODE_DATA(nid)->node_mem_map + i))
if (PageReserved(nid_page_nr(nid, i)))
reservedpages++;
return reservedpages;

5
arch/mips/sgi-ip27/ip27-memory.c
View file

@ -549,9 +549,8 @@ void __init mem_init(void)
*/
numslots = node_getlastslot(node);
for (slot = 1; slot <= numslots; slot++) {
p = NODE_DATA(node)->node_mem_map +
(slot_getbasepfn(node, slot) -
slot_getbasepfn(node, 0));
p = nid_page_nr(node, slot_getbasepfn(node, slot) -
slot_getbasepfn(node, 0));
/*
* Free valid memory in current slot.

2
arch/parisc/mm/init.c
View file

@ -506,7 +506,7 @@ void show_mem(void)
for (j = node_start_pfn(i); j < node_end_pfn(i); j++) {
struct page *p;
p = node_mem_map(i) + j - node_start_pfn(i);
p = nid_page_nr(i, j) - node_start_pfn(i);
total++;
if (PageReserved(p))

4
arch/ppc64/mm/init.c
View file

@ -98,7 +98,7 @@ void show_mem(void)
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
for_each_pgdat(pgdat) {
for (i = 0; i < pgdat->node_spanned_pages; i++) {
page = pgdat->node_mem_map + i;
page = pgdat_page_nr(pgdat, i);
total++;
if (PageReserved(page))
reserved++;
@ -654,7 +654,7 @@ void __init mem_init(void)
for_each_pgdat(pgdat) {
for (i = 0; i < pgdat->node_spanned_pages; i++) {
page = pgdat->node_mem_map + i;
page = pgdat_page_nr(pgdat, i);
if (PageReserved(page))
reservedpages++;
}

3
include/asm-alpha/mmzone.h
View file

@ -57,7 +57,6 @@ PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
* Given a kernel address, find the home node of the underlying memory.
*/
#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define local_mapnr(kvaddr) \
@ -108,7 +107,7 @@ PLAT_NODE_DATA_LOCALNR(unsigned long p, int n)
#define pfn_to_page(pfn) \
({ \
unsigned long kaddr = (unsigned long)__va((pfn) << PAGE_SHIFT); \
(node_mem_map(kvaddr_to_nid(kaddr)) + local_mapnr(kaddr)); \
(NODE_DATA(kvaddr_to_nid(kaddr))->node_mem_map + local_mapnr(kaddr)); \
})
#define page_to_pfn(page) \

3
include/asm-i386/mmzone.h
View file

@ -79,7 +79,6 @@ static inline int pfn_to_nid(unsigned long pfn)
*/
#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) \
({ \
@ -100,7 +99,7 @@ static inline int pfn_to_nid(unsigned long pfn)
({ \
unsigned long __pfn = pfn; \
int __node = pfn_to_nid(__pfn); \
&node_mem_map(__node)[node_localnr(__pfn,__node)]; \
&NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \
})
#define page_to_pfn(pg) \

3
include/asm-m32r/mmzone.h
View file

@ -14,7 +14,6 @@ extern struct pglist_data *node_data[];
#define NODE_DATA(nid) (node_data[nid])
#define node_localnr(pfn, nid) ((pfn) - NODE_DATA(nid)->node_start_pfn)
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) \
({ \
@ -32,7 +31,7 @@ extern struct pglist_data *node_data[];
({ \
unsigned long __pfn = pfn; \
int __node = pfn_to_nid(__pfn); \
&node_mem_map(__node)[node_localnr(__pfn,__node)]; \
&NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \
})
#define page_to_pfn(pg) \

3
include/asm-parisc/mmzone.h
View file

@ -19,7 +19,6 @@ extern struct node_map_data node_data[];
*/
#define kvaddr_to_nid(kaddr) pfn_to_nid(__pa(kaddr) >> PAGE_SHIFT)
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) \
({ \
@ -38,7 +37,7 @@ extern struct node_map_data node_data[];
({ \
unsigned long __pfn = (pfn); \
int __node = pfn_to_nid(__pfn); \
&node_mem_map(__node)[node_localnr(__pfn,__node)]; \
&NODE_DATA(__node)->node_mem_map[node_localnr(__pfn,__node)]; \
})
#define page_to_pfn(pg) \

3
include/asm-ppc64/mmzone.h
View file

@ -65,7 +65,6 @@ static inline int pa_to_nid(unsigned long pa)
*/
#define kvaddr_to_nid(kaddr) pa_to_nid(__pa(kaddr))
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) (NODE_DATA(nid)->node_end_pfn)
@ -76,7 +75,7 @@ static inline int pa_to_nid(unsigned long pa)
#define discontigmem_pfn_to_page(pfn) \
({ \
unsigned long __tmp = pfn; \
(node_mem_map(pfn_to_nid(__tmp)) + \
(NODE_DATA(pfn_to_nid(__tmp))->node_mem_map + \
node_localnr(__tmp, pfn_to_nid(__tmp))); \
})

5
include/asm-x86_64/mmzone.h
View file

@ -35,9 +35,6 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
#define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr))
#define NODE_DATA(nid) (node_data[nid])
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_mem_map(nid) (NODE_DATA(nid)->node_mem_map)
#define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn)
#define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \
NODE_DATA(nid)->node_spanned_pages)
@ -50,7 +47,7 @@ static inline __attribute__((pure)) int phys_to_nid(unsigned long addr)
(2.4 used to). */
#define pfn_to_page(pfn) ({ \
int nid = phys_to_nid(((unsigned long)(pfn)) << PAGE_SHIFT); \
((pfn) - node_start_pfn(nid)) + node_mem_map(nid); \
((pfn) - node_start_pfn(nid)) + NODE_DATA(nid)->node_mem_map; \
})
#define page_to_pfn(page) \

2
include/linux/mmzone.h
View file

@ -284,6 +284,8 @@ typedef struct pglist_data {
#define node_present_pages(nid) (NODE_DATA(nid)->node_present_pages)
#define node_spanned_pages(nid) (NODE_DATA(nid)->node_spanned_pages)
#define pgdat_page_nr(pgdat, pagenr) ((pgdat)->node_mem_map + (pagenr))
#define nid_page_nr(nid, pagenr) pgdat_page_nr(NODE_DATA(nid),(pagenr))
extern struct pglist_data *pgdat_list;