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[Lse-tech] [RFC PATCH 3/10] Replace 'numnodes' with 'node_online_map' - i386
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From: Matthew D. <col...@us...> - 2004-12-23 22:39:44
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3/10 - Replace numnodes with node_online_map for i386
[mcd@arrakis node_online_map]$ diffstat arch-i386.patch
arch/i386/kernel/mpparse.c | 4 ++--
arch/i386/kernel/numaq.c | 10 ++++------
arch/i386/kernel/srat.c | 32 ++++++++++++++++++--------------
arch/i386/mm/discontig.c | 28 +++++++++++++++++-----------
arch/i386/pci/numa.c | 7 ++++---
include/asm-i386/mach-numaq/mach_apic.h | 10 ++++++----
6 files changed, 51 insertions(+), 40 deletions(-)
-Matt
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.10-rc3-mm1/arch/i386/kernel/mpparse.c linux-2.6.10-rc3-mm1-nom.i386/arch/i386/kernel/mpparse.c
--- linux-2.6.10-rc3-mm1/arch/i386/kernel/mpparse.c 2004-12-13 16:21:50.000000000 -0800
+++ linux-2.6.10-rc3-mm1-nom.i386/arch/i386/kernel/mpparse.c 2004-12-16 11:41:35.000000000 -0800
@@ -309,8 +309,8 @@ static void __init MP_translation_info (
printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
else
translation_table[mpc_record] = m; /* stash this for later */
- if (m->trans_quad+1 > numnodes)
- numnodes = m->trans_quad+1;
+ if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
+ node_set_online(m->trans_quad);
}
/*
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.10-rc3-mm1/arch/i386/kernel/numaq.c linux-2.6.10-rc3-mm1-nom.i386/arch/i386/kernel/numaq.c
--- linux-2.6.10-rc3-mm1/arch/i386/kernel/numaq.c 2004-12-13 16:21:50.000000000 -0800
+++ linux-2.6.10-rc3-mm1-nom.i386/arch/i386/kernel/numaq.c 2004-12-16 11:44:44.000000000 -0800
@@ -40,8 +40,7 @@ extern long node_start_pfn[], node_end_p
* Function: smp_dump_qct()
*
* Description: gets memory layout from the quad config table. This
- * function also increments numnodes with the number of nodes (quads)
- * present.
+ * function also updates node_online_map with the nodes (quads) present.
*/
static void __init smp_dump_qct(void)
{
@@ -50,11 +49,10 @@ static void __init smp_dump_qct(void)
struct sys_cfg_data *scd =
(struct sys_cfg_data *)__va(SYS_CFG_DATA_PRIV_ADDR);
- numnodes = 0;
- for(node = 0; node < MAX_NUMNODES; node++) {
- if(scd->quads_present31_0 & (1 << node)) {
+ nodes_clear(node_online_map);
+ for_each_node(node) {
+ if (scd->quads_present31_0 & (1 << node)) {
node_set_online(node);
- numnodes++;
eq = &scd->eq[node];
/* Convert to pages */
node_start_pfn[node] = MB_TO_PAGES(
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.10-rc3-mm1/arch/i386/kernel/srat.c linux-2.6.10-rc3-mm1-nom.i386/arch/i386/kernel/srat.c
--- linux-2.6.10-rc3-mm1/arch/i386/kernel/srat.c 2004-12-13 16:21:50.000000000 -0800
+++ linux-2.6.10-rc3-mm1-nom.i386/arch/i386/kernel/srat.c 2004-12-16 17:12:38.000000000 -0800
@@ -232,18 +232,22 @@ static int __init acpi20_parse_srat(stru
* a set of sequential node IDs starting at zero. (ACPI doesn't seem
* to specify the range of _PXM values.)
*/
- numnodes = 0; /* init total nodes in system */
+ /*
+ * MCD - we no longer HAVE to number nodes sequentially. PXM domain
+ * numbers could go as high as 256, and MAX_NUMNODES for i386 is typically
+ * 32, so we will continue numbering them in this manner until MAX_NUMNODES
+ * approaches MAX_PXM_DOMAINS for i386.
+ */
+ nodes_clear(node_online_map);
for (i = 0; i < MAX_PXM_DOMAINS; i++) {
if (BMAP_TEST(pxm_bitmap, i)) {
- pxm_to_nid_map[i] = numnodes;
- nid_to_pxm_map[numnodes] = i;
- node_set_online(numnodes);
- ++numnodes;
+ nid = num_online_nodes();
+ pxm_to_nid_map[i] = nid;
+ nid_to_pxm_map[nid] = i;
+ node_set_online(nid);
}
}
-
- if (numnodes == 0)
- BUG();
+ BUG_ON(num_online_nodes() == 0);
/* set cnode id in memory chunk structure */
for (i = 0; i < num_memory_chunks; i++)
@@ -254,7 +258,7 @@ static int __init acpi20_parse_srat(stru
printk("%02X ", pxm_bitmap[i]);
}
printk("\n");
- printk("Number of logical nodes in system = %d\n", numnodes);
+ printk("Number of logical nodes in system = %d\n", num_online_nodes());
printk("Number of memory chunks in system = %d\n", num_memory_chunks);
for (j = 0; j < num_memory_chunks; j++){
@@ -265,7 +269,7 @@ static int __init acpi20_parse_srat(stru
}
/*calculate node_start_pfn/node_end_pfn arrays*/
- for (nid = 0; nid < numnodes; nid++) {
+ for_each_online_node(nid) {
int been_here_before = 0;
for (j = 0; j < num_memory_chunks; j++){
@@ -397,7 +401,7 @@ static void __init get_zholes_init(void)
int first;
unsigned long end = 0;
- for (nid = 0; nid < numnodes; nid++) {
+ for_each_online_node(nid) {
first = 1;
for (c = 0; c < num_memory_chunks; c++){
if (node_memory_chunk[c].nid == nid) {
@@ -425,8 +429,8 @@ unsigned long * __init get_zholes_size(i
zholes_size_init++;
get_zholes_init();
}
- if((nid >= numnodes) | (nid >= MAX_NUMNODES))
- printk("%s: nid = %d is invalid. numnodes = %d",
- __FUNCTION__, nid, numnodes);
+ if (nid >= MAX_NUMNODES || !node_online(nid))
+ printk("%s: nid = %d is invalid/offline. num_online_nodes = %d",
+ __FUNCTION__, nid, num_online_nodes());
return &zholes_size[nid * MAX_NR_ZONES];
}
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.10-rc3-mm1/arch/i386/mm/discontig.c linux-2.6.10-rc3-mm1-nom.i386/arch/i386/mm/discontig.c
--- linux-2.6.10-rc3-mm1/arch/i386/mm/discontig.c 2004-12-13 16:21:52.000000000 -0800
+++ linux-2.6.10-rc3-mm1-nom.i386/arch/i386/mm/discontig.c 2004-12-16 12:00:52.000000000 -0800
@@ -42,7 +42,7 @@ bootmem_data_t node0_bdata;
* numa interface - we expect the numa architecture specfic code to have
* populated the following initialisation.
*
- * 1) numnodes - the total number of nodes configured in the system
+ * 1) node_online_map - the map of all nodes configured (online) in the system
* 2) physnode_map - the mapping between a pfn and owning node
* 3) node_start_pfn - the starting page frame number for a node
* 3) node_end_pfn - the ending page fram number for a node
@@ -94,12 +94,12 @@ int __init get_memcfg_numa_flat(void)
/* Run the memory configuration and find the top of memory. */
find_max_pfn();
- node_start_pfn[0] = 0;
- node_end_pfn[0] = max_pfn;
+ node_start_pfn[0] = 0;
+ node_end_pfn[0] = max_pfn;
/* Indicate there is one node available. */
+ nodes_clear(node_online_map);
node_set_online(0);
- numnodes = 1;
return 1;
}
@@ -184,7 +184,9 @@ void __init remap_numa_kva(void)
unsigned long pfn;
int node;
- for (node = 1; node < numnodes; ++node) {
+ for_each_online_node(node) {
+ if (node == 0)
+ continue;
for (pfn=0; pfn < node_remap_size[node]; pfn += PTRS_PER_PTE) {
vaddr = node_remap_start_vaddr[node]+(pfn<<PAGE_SHIFT);
set_pmd_pfn((ulong) vaddr,
@@ -199,7 +201,9 @@ static unsigned long calculate_numa_rema
int nid;
unsigned long size, reserve_pages = 0;
- for (nid = 1; nid < numnodes; nid++) {
+ for_each_online_node(nid) {
+ if (nid == 0)
+ continue;
/* calculate the size of the mem_map needed in bytes */
size = (node_end_pfn[nid] - node_start_pfn[nid] + 1)
* sizeof(struct page) + sizeof(pg_data_t);
@@ -249,7 +253,7 @@ unsigned long __init setup_memory(void)
get_memcfg_numa();
/* Fill in the physnode_map */
- for (nid = 0; nid < numnodes; nid++) {
+ for_each_online_node(nid) {
printk("Node: %d, start_pfn: %ld, end_pfn: %ld\n",
nid, node_start_pfn[nid], node_end_pfn[nid]);
printk(" Setting physnode_map array to node %d for pfns:\n ",
@@ -286,7 +290,7 @@ unsigned long __init setup_memory(void)
printk("Low memory ends at vaddr %08lx\n",
(ulong) pfn_to_kaddr(max_low_pfn));
- for (nid = 0; nid < numnodes; nid++) {
+ for_each_online_node(nid) {
node_remap_start_vaddr[nid] = pfn_to_kaddr(
(highstart_pfn + reserve_pages) - node_remap_offset[nid]);
allocate_pgdat(nid);
@@ -298,7 +302,7 @@ unsigned long __init setup_memory(void)
printk("High memory starts at vaddr %08lx\n",
(ulong) pfn_to_kaddr(highstart_pfn));
vmalloc_earlyreserve = reserve_pages * PAGE_SIZE;
- for (nid = 0; nid < numnodes; nid++)
+ for_each_online_node(nid)
find_max_pfn_node(nid);
NODE_DATA(0)->bdata = &node0_bdata;
@@ -379,14 +383,16 @@ void __init zone_sizes_init(void)
* Clobber node 0's links and NULL out pgdat_list before starting.
*/
pgdat_list = NULL;
- for (nid = numnodes - 1; nid >= 0; nid--) {
+ for (nid = MAX_NUMNODES - 1; nid >= 0; nid--) {
+ if (!node_online(nid))
+ continue;
if (nid)
memset(NODE_DATA(nid), 0, sizeof(pg_data_t));
NODE_DATA(nid)->pgdat_next = pgdat_list;
pgdat_list = NODE_DATA(nid);
}
- for (nid = 0; nid < numnodes; nid++) {
+ for_each_online_node(nid) {
unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 0};
unsigned long *zholes_size;
unsigned int max_dma;
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.10-rc3-mm1/arch/i386/pci/numa.c linux-2.6.10-rc3-mm1-nom.i386/arch/i386/pci/numa.c
--- linux-2.6.10-rc3-mm1/arch/i386/pci/numa.c 2004-12-13 16:21:53.000000000 -0800
+++ linux-2.6.10-rc3-mm1-nom.i386/arch/i386/pci/numa.c 2004-12-16 12:04:17.000000000 -0800
@@ -112,14 +112,15 @@ static int __init pci_numa_init(void)
return 0;
pci_root_bus = pcibios_scan_root(0);
- if (numnodes > 1) {
- for (quad = 1; quad < numnodes; ++quad) {
+ if (num_online_nodes() > 1)
+ for_each_online_node(quad) {
+ if (quad == 0)
+ continue;
printk("Scanning PCI bus %d for quad %d\n",
QUADLOCAL2BUS(quad,0), quad);
pci_scan_bus(QUADLOCAL2BUS(quad,0),
&pci_root_ops, NULL);
}
- }
return 0;
}
diff -Nurp --exclude-from=/home/mcd/.dontdiff linux-2.6.10-rc3-mm1/include/asm-i386/mach-numaq/mach_apic.h linux-2.6.10-rc3-mm1-nom.i386/include/asm-i386/mach-numaq/mach_apic.h
--- linux-2.6.10-rc3-mm1/include/asm-i386/mach-numaq/mach_apic.h 2004-12-13 16:24:09.000000000 -0800
+++ linux-2.6.10-rc3-mm1-nom.i386/include/asm-i386/mach-numaq/mach_apic.h 2004-12-16 12:06:26.000000000 -0800
@@ -112,13 +112,15 @@ static inline int mpc_apic_id(struct mpc
static inline void setup_portio_remap(void)
{
- if (numnodes <= 1)
+ int num_quads = num_online_nodes();
+
+ if (num_quads <= 1)
return;
- printk("Remapping cross-quad port I/O for %d quads\n", numnodes);
- xquad_portio = ioremap (XQUAD_PORTIO_BASE, numnodes*XQUAD_PORTIO_QUAD);
+ printk("Remapping cross-quad port I/O for %d quads\n", num_quads);
+ xquad_portio = ioremap(XQUAD_PORTIO_BASE, num_quads*XQUAD_PORTIO_QUAD);
printk("xquad_portio vaddr 0x%08lx, len %08lx\n",
- (u_long) xquad_portio, (u_long) numnodes*XQUAD_PORTIO_QUAD);
+ (u_long) xquad_portio, (u_long) num_quads*XQUAD_PORTIO_QUAD);
}
static inline int check_phys_apicid_present(int boot_cpu_physical_apicid)
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