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Subjectpercpu-2.5.63-bk5-1 (properly generated)
This patch does 3 different things:
(1) shoves per-cpu areas into node-local memory
(2) creates a new per-node thing analogous to per-cpu
(3) uses (1) and (2) to shove several frequently-accessed things into
node-local memory

Tested, boots, and runs on NUMA-Q. Trims 6s of 41s off kernel compiles.
Compiletested for walmart x86 SMP/UP, and could use runtime testing.
A few non-x86 arches probably need fixups for per_cpu irq_stat[].

Also available at:
ftp://ftp.kernel.org/pub/linux/kernel/people/wli/percpu/

-- wli


arch/i386/kernel/apic.c | 2
arch/i386/kernel/io_apic.c | 2
arch/i386/kernel/irq.c | 2
arch/i386/kernel/nmi.c | 4 -
arch/i386/kernel/process.c | 2
arch/i386/mm/discontig.c | 83 ++++++++++++++++++++++++---
arch/i386/mm/init.c | 4 -
arch/i386/vmlinux.lds.S | 4 +
include/asm-generic/percpu.h | 4 -
include/asm-generic/pernode.h | 39 ++++++++++++
include/asm-i386/numaq.h | 9 +-
include/asm-i386/percpu.h | 5 +
include/asm-i386/pernode.h | 11 +++
include/asm-i386/srat.h | 3
include/asm-i386/tlb.h | 128 +++++++++++++++++++++++++++++++++++++++++-
include/linux/irq_cpustat.h | 10 +--
include/linux/mm.h | 6 +
init/main.c | 30 +++++++++
kernel/fork.c | 10 +--
kernel/ksyms.c | 2
kernel/sched.c | 18 ++---
kernel/softirq.c | 2
mm/page_alloc.c | 6 -
mm/slab.c | 6 -
24 files changed, 338 insertions(+), 54 deletions(-)


diff -urpN linux-2.5.63-bk5/arch/i386/kernel/apic.c pernode-2.5.63-bk5-1/arch/i386/kernel/apic.c
--- linux-2.5.63-bk5/arch/i386/kernel/apic.c 2003-03-02 01:05:07.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/kernel/apic.c 2003-03-02 02:55:14.000000000 -0800
@@ -1060,7 +1060,7 @@ void smp_apic_timer_interrupt(struct pt_
/*
* the NMI deadlock-detector uses this.
*/
- irq_stat[cpu].apic_timer_irqs++;
+ per_cpu(irq_stat, cpu).apic_timer_irqs++;

/*
* NOTE! We'd better ACK the irq immediately,
diff -urpN linux-2.5.63-bk5/arch/i386/kernel/io_apic.c pernode-2.5.63-bk5-1/arch/i386/kernel/io_apic.c
--- linux-2.5.63-bk5/arch/i386/kernel/io_apic.c 2003-03-02 01:05:07.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/kernel/io_apic.c 2003-03-02 02:55:14.000000000 -0800
@@ -237,7 +237,7 @@ struct irq_cpu_info {
#define IRQ_DELTA(cpu,irq) (irq_cpu_data[cpu].irq_delta[irq])

#define IDLE_ENOUGH(cpu,now) \
- (idle_cpu(cpu) && ((now) - irq_stat[(cpu)].idle_timestamp > 1))
+ (idle_cpu(cpu) && ((now) - per_cpu(irq_stat, cpu).idle_timestamp > 1))

#define IRQ_ALLOWED(cpu,allowed_mask) \
((1 << cpu) & (allowed_mask))
diff -urpN linux-2.5.63-bk5/arch/i386/kernel/irq.c pernode-2.5.63-bk5-1/arch/i386/kernel/irq.c
--- linux-2.5.63-bk5/arch/i386/kernel/irq.c 2003-03-02 01:05:07.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/kernel/irq.c 2003-03-02 02:55:14.000000000 -0800
@@ -171,7 +171,7 @@ int show_interrupts(struct seq_file *p,
seq_printf(p, "LOC: ");
for (j = 0; j < NR_CPUS; j++)
if (cpu_online(j))
- p += seq_printf(p, "%10u ", irq_stat[j].apic_timer_irqs);
+ p += seq_printf(p, "%10u ", per_cpu(irq_stat, j).apic_timer_irqs);
seq_putc(p, '\n');
#endif
seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
diff -urpN linux-2.5.63-bk5/arch/i386/kernel/nmi.c pernode-2.5.63-bk5-1/arch/i386/kernel/nmi.c
--- linux-2.5.63-bk5/arch/i386/kernel/nmi.c 2003-03-02 01:05:07.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/kernel/nmi.c 2003-03-02 02:55:14.000000000 -0800
@@ -76,7 +76,7 @@ int __init check_nmi_watchdog (void)
printk(KERN_INFO "testing NMI watchdog ... ");

for (cpu = 0; cpu < NR_CPUS; cpu++)
- prev_nmi_count[cpu] = irq_stat[cpu].__nmi_count;
+ prev_nmi_count[cpu] = per_cpu(irq_stat, cpu).__nmi_count;
local_irq_enable();
mdelay((10*1000)/nmi_hz); // wait 10 ticks

@@ -358,7 +358,7 @@ void nmi_watchdog_tick (struct pt_regs *
*/
int sum, cpu = smp_processor_id();

- sum = irq_stat[cpu].apic_timer_irqs;
+ sum = per_cpu(irq_stat, cpu).apic_timer_irqs;

if (last_irq_sums[cpu] == sum) {
/*
diff -urpN linux-2.5.63-bk5/arch/i386/kernel/process.c pernode-2.5.63-bk5-1/arch/i386/kernel/process.c
--- linux-2.5.63-bk5/arch/i386/kernel/process.c 2003-02-24 11:05:04.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/kernel/process.c 2003-03-02 02:55:14.000000000 -0800
@@ -141,7 +141,7 @@ void cpu_idle (void)
void (*idle)(void) = pm_idle;
if (!idle)
idle = default_idle;
- irq_stat[smp_processor_id()].idle_timestamp = jiffies;
+ per_cpu(irq_stat, smp_processor_id()).idle_timestamp = jiffies;
while (!need_resched())
idle();
schedule();
diff -urpN linux-2.5.63-bk5/arch/i386/mm/discontig.c pernode-2.5.63-bk5-1/arch/i386/mm/discontig.c
--- linux-2.5.63-bk5/arch/i386/mm/discontig.c 2003-03-02 01:05:07.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/mm/discontig.c 2003-03-02 02:55:14.000000000 -0800
@@ -48,8 +48,6 @@ extern unsigned long max_low_pfn;
extern unsigned long totalram_pages;
extern unsigned long totalhigh_pages;

-#define LARGE_PAGE_BYTES (PTRS_PER_PTE * PAGE_SIZE)
-
unsigned long node_remap_start_pfn[MAX_NUMNODES];
unsigned long node_remap_size[MAX_NUMNODES];
unsigned long node_remap_offset[MAX_NUMNODES];
@@ -67,6 +65,74 @@ static void __init find_max_pfn_node(int
node_end_pfn[nid] = max_pfn;
}

+extern char __per_cpu_start[], __per_cpu_end[];
+extern char __per_node_start[], __per_node_end[];
+unsigned long __per_cpu_offset[NR_CPUS], __per_node_offset[MAX_NR_NODES];
+
+#define PER_CPU_PAGES PFN_UP((unsigned long)(__per_cpu_end-__per_cpu_start))
+#define PER_NODE_PAGES PFN_UP((unsigned long)(__per_node_end-__per_node_start))
+#define MEM_MAP_SIZE(n) PFN_UP((node_end_pfn[n]-node_start_pfn[n]+1)*sizeof(struct page))
+
+static void __init allocate_per_cpu_pages(int cpu)
+{
+ int cpu_in_node, node = cpu_to_node(cpu);
+ unsigned long vaddr, nodemask = node_to_cpumask(node);
+
+ if (!PER_CPU_PAGES || node >= numnodes)
+ return;
+
+ if (!node) {
+ vaddr = (unsigned long)alloc_bootmem(PER_CPU_PAGES*PAGE_SIZE);
+ __per_cpu_offset[cpu] = vaddr - (unsigned long)__per_cpu_start;
+ } else {
+ vaddr = (unsigned long)node_remap_start_vaddr[node];
+ cpu_in_node = hweight32(nodemask & ((1UL << cpu) - 1));
+ __per_cpu_offset[cpu] = vaddr + PAGE_SIZE*MEM_MAP_SIZE(node)
+ + PAGE_SIZE*PFN_UP(sizeof(pg_data_t))
+ + PAGE_SIZE*PER_NODE_PAGES
+ + PAGE_SIZE*PER_CPU_PAGES*cpu_in_node
+ - (unsigned long)__per_cpu_start;
+ }
+ memcpy(RELOC_HIDE((char *)__per_cpu_start, __per_cpu_offset[cpu]),
+ __per_cpu_start,
+ PER_CPU_PAGES*PAGE_SIZE);
+}
+
+static void __init allocate_per_node_pages(int node)
+{
+ unsigned long vaddr;
+
+ if (!node) {
+ vaddr = (unsigned long)alloc_bootmem(PER_NODE_PAGES*PAGE_SIZE);
+ __per_node_offset[node] = vaddr - (unsigned long)__per_node_start;
+ } else {
+ vaddr = (unsigned long)node_remap_start_vaddr[node];
+ __per_node_offset[node] = vaddr + PAGE_SIZE*MEM_MAP_SIZE(node)
+ + PAGE_SIZE*PFN_UP(sizeof(pg_data_t))
+ - (unsigned long)__per_node_start;
+ }
+ memcpy(RELOC_HIDE((char *)__per_node_start, __per_node_offset[node]),
+ __per_node_start,
+ PER_NODE_PAGES*PAGE_SIZE);
+}
+
+void __init setup_per_cpu_areas(void)
+{
+ int cpu;
+ for (cpu = 0; cpu < NR_CPUS; ++cpu)
+ allocate_per_cpu_pages(cpu);
+}
+
+void __init setup_per_node_areas(void)
+{
+ int node;
+ void zone_sizes_init(void);
+
+ for (node = 0; node < numnodes; ++node)
+ allocate_per_node_pages(node);
+ zone_sizes_init();
+}
+
/*
* Allocate memory for the pg_data_t via a crude pre-bootmem method
* We ought to relocate these onto their own node later on during boot.
@@ -144,13 +210,12 @@ static unsigned long calculate_numa_rema
unsigned long size, reserve_pages = 0;

for (nid = 1; nid < numnodes; nid++) {
- /* 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);
- /* convert size to large (pmd size) pages, rounding up */
- size = (size + LARGE_PAGE_BYTES - 1) / LARGE_PAGE_BYTES;
- /* now the roundup is correct, convert to PAGE_SIZE pages */
- size = size * PTRS_PER_PTE;
+ /* calculate the size of the mem_map needed in pages */
+ size = MEM_MAP_SIZE(nid) + PFN_UP(sizeof(pg_data_t))
+ + PER_NODE_PAGES
+ + PER_CPU_PAGES*MAX_NODE_CPUS;
+ /* round up to nearest pmd boundary */
+ size = (size + PTRS_PER_PTE - 1) & ~(PTRS_PER_PTE - 1);
printk("Reserving %ld pages of KVA for lmem_map of node %d\n",
size, nid);
node_remap_size[nid] = size;
diff -urpN linux-2.5.63-bk5/arch/i386/mm/init.c pernode-2.5.63-bk5-1/arch/i386/mm/init.c
--- linux-2.5.63-bk5/arch/i386/mm/init.c 2003-02-24 11:05:39.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/mm/init.c 2003-03-02 02:55:14.000000000 -0800
@@ -41,7 +41,7 @@
#include <asm/tlbflush.h>
#include <asm/sections.h>

-struct mmu_gather mmu_gathers[NR_CPUS];
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long highstart_pfn, highend_pfn;

/*
@@ -372,7 +372,9 @@ void __init paging_init(void)
__flush_tlb_all();

kmap_init();
+#ifndef CONFIG_DISCONTIGMEM
zone_sizes_init();
+#endif
}

/*
diff -urpN linux-2.5.63-bk5/arch/i386/vmlinux.lds.S pernode-2.5.63-bk5-1/arch/i386/vmlinux.lds.S
--- linux-2.5.63-bk5/arch/i386/vmlinux.lds.S 2003-02-24 11:05:11.000000000 -0800
+++ pernode-2.5.63-bk5-1/arch/i386/vmlinux.lds.S 2003-03-02 02:55:14.000000000 -0800
@@ -83,6 +83,10 @@ SECTIONS
.data.percpu : { *(.data.percpu) }
__per_cpu_end = .;
. = ALIGN(4096);
+ __per_node_start = .;
+ .data.pernode : { *(.data.pernode) }
+ __per_node_end = .;
+ . = ALIGN(4096);
__init_end = .;
/* freed after init ends here */

diff -urpN linux-2.5.63-bk5/include/asm-generic/percpu.h pernode-2.5.63-bk5-1/include/asm-generic/percpu.h
--- linux-2.5.63-bk5/include/asm-generic/percpu.h 2003-02-24 11:05:13.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/asm-generic/percpu.h 2003-03-02 02:55:14.000000000 -0800
@@ -25,8 +25,8 @@ extern unsigned long __per_cpu_offset[NR
__typeof__(type) name##__per_cpu
#endif

-#define per_cpu(var, cpu) ((void)cpu, var##__per_cpu)
-#define __get_cpu_var(var) var##__per_cpu
+#define per_cpu(var, cpu) ( (void)(cpu), var##__per_cpu )
+#define __get_cpu_var(var) var##__per_cpu

#endif /* SMP */

diff -urpN linux-2.5.63-bk5/include/asm-generic/pernode.h pernode-2.5.63-bk5-1/include/asm-generic/pernode.h
--- linux-2.5.63-bk5/include/asm-generic/pernode.h 1969-12-31 16:00:00.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/asm-generic/pernode.h 2003-03-02 02:55:14.000000000 -0800
@@ -0,0 +1,39 @@
+#ifndef _ASM_GENERIC_PERNODE_H_
+#define _ASM_GENERIC_PERNODE_H_
+#include <linux/config.h>
+#include <linux/compiler.h>
+
+#define __GENERIC_PER_NODE
+#ifdef CONFIG_DISCONTIGMEM
+
+extern unsigned long __per_node_offset[MAX_NR_NODES];
+
+/* Separate out the type, so (int[3], foo) works. */
+#ifndef MODULE
+#define DEFINE_PER_NODE(type, name) \
+ __attribute__((__section__(".data.pernode"))) __typeof__(type) name##__per_node
+#endif
+
+/* var is in discarded region: offset to particular copy we want */
+#define per_node(var, node) (*RELOC_HIDE(&var##__per_node, __per_node_offset[node]))
+#define __get_node_var(var) per_node(var, numa_node_id())
+
+#else /* !CONFIG_DISCONTIGMEM */
+
+/* Can't define per-node variables in modules. Sorry -- wli */
+#ifndef MODULE
+#define DEFINE_PER_NODE(type, name) \
+ __typeof__(type) name##__per_node
+#endif
+
+#define per_node(var, node) ( (void)(node), var##__per_node )
+#define __get_node_var(var) var##__per_node
+
+#endif /* CONFIG_DISCONTIGMEM */
+
+#define DECLARE_PER_NODE(type, name) extern __typeof__(type) name##__per_node
+
+#define EXPORT_PER_NODE_SYMBOL(var) EXPORT_SYMBOL(var##__per_node)
+#define EXPORT_PER_NODE_SYMBOL_GPL(var) EXPORT_SYMBOL_GPL(var##__per_node)
+
+#endif /* _ASM_GENERIC_PERNODE_H_ */
diff -urpN linux-2.5.63-bk5/include/asm-i386/numaq.h pernode-2.5.63-bk5-1/include/asm-i386/numaq.h
--- linux-2.5.63-bk5/include/asm-i386/numaq.h 2003-03-02 01:05:09.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/asm-i386/numaq.h 2003-03-02 02:55:14.000000000 -0800
@@ -39,8 +39,9 @@
extern int physnode_map[];
#define pfn_to_nid(pfn) ({ physnode_map[(pfn) / PAGES_PER_ELEMENT]; })
#define pfn_to_pgdat(pfn) NODE_DATA(pfn_to_nid(pfn))
-#define PHYSADDR_TO_NID(pa) pfn_to_nid(pa >> PAGE_SHIFT)
-#define MAX_NUMNODES 8
+#define PHYSADDR_TO_NID(pa) pfn_to_nid((pa) >> PAGE_SHIFT)
+#define MAX_NUMNODES 16
+#define MAX_NODE_CPUS 4
extern void get_memcfg_numaq(void);
#define get_memcfg_numa() get_memcfg_numaq()

@@ -169,9 +170,9 @@ struct sys_cfg_data {
struct eachquadmem eq[MAX_NUMNODES]; /* indexed by quad id */
};

-static inline unsigned long get_zholes_size(int nid)
+static inline unsigned long *get_zholes_size(int nid)
{
- return 0;
+ return NULL;
}
#endif /* CONFIG_X86_NUMAQ */
#endif /* NUMAQ_H */
diff -urpN linux-2.5.63-bk5/include/asm-i386/percpu.h pernode-2.5.63-bk5-1/include/asm-i386/percpu.h
--- linux-2.5.63-bk5/include/asm-i386/percpu.h 2003-02-24 11:05:44.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/asm-i386/percpu.h 2003-03-02 02:55:14.000000000 -0800
@@ -3,4 +3,9 @@

#include <asm-generic/percpu.h>

+#ifdef CONFIG_NUMA
+#undef __GENERIC_PER_CPU
+void setup_per_cpu_areas(void);
+#endif
+
#endif /* __ARCH_I386_PERCPU__ */
diff -urpN linux-2.5.63-bk5/include/asm-i386/pernode.h pernode-2.5.63-bk5-1/include/asm-i386/pernode.h
--- linux-2.5.63-bk5/include/asm-i386/pernode.h 1969-12-31 16:00:00.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/asm-i386/pernode.h 2003-03-02 02:55:14.000000000 -0800
@@ -0,0 +1,11 @@
+#ifndef __ARCH_I386_PERNODE__
+#define __ARCH_I386_PERNODE__
+
+#include <asm-generic/pernode.h>
+
+#ifdef CONFIG_DISCONTIGMEM
+#undef __GENERIC_PER_NODE
+void setup_per_node_areas(void);
+#endif
+
+#endif /* __ARCH_I386_PERNODE__ */
diff -urpN linux-2.5.63-bk5/include/asm-i386/srat.h pernode-2.5.63-bk5-1/include/asm-i386/srat.h
--- linux-2.5.63-bk5/include/asm-i386/srat.h 2003-03-02 01:05:09.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/asm-i386/srat.h 2003-03-02 02:55:14.000000000 -0800
@@ -37,8 +37,9 @@
extern int pfnnode_map[];
#define pfn_to_nid(pfn) ({ pfnnode_map[PFN_TO_ELEMENT(pfn)]; })
#define pfn_to_pgdat(pfn) NODE_DATA(pfn_to_nid(pfn))
-#define PHYSADDR_TO_NID(pa) pfn_to_nid(pa >> PAGE_SHIFT)
+#define PHYSADDR_TO_NID(pa) pfn_to_nid((pa) >> PAGE_SHIFT)
#define MAX_NUMNODES 8
+#define MAX_NODE_CPUS 4
extern void get_memcfg_from_srat(void);
extern unsigned long *get_zholes_size(int);
#define get_memcfg_numa() get_memcfg_from_srat()
diff -urpN linux-2.5.63-bk5/include/asm-i386/tlb.h pernode-2.5.63-bk5-1/include/asm-i386/tlb.h
--- linux-2.5.63-bk5/include/asm-i386/tlb.h 2003-02-24 11:05:14.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/asm-i386/tlb.h 2003-03-02 02:55:14.000000000 -0800
@@ -1,6 +1,10 @@
#ifndef _I386_TLB_H
#define _I386_TLB_H

+#include <linux/config.h>
+#include <asm/tlbflush.h>
+#include <asm/percpu.h>
+
/*
* x86 doesn't need any special per-pte or
* per-vma handling..
@@ -15,6 +19,128 @@
*/
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)

-#include <asm-generic/tlb.h>
+/*
+ * For UP we don't need to worry about TLB flush
+ * and page free order so much..
+ */
+#ifdef CONFIG_SMP
+ #define FREE_PTE_NR 506
+ #define tlb_fast_mode(tlb) ((tlb)->nr == ~0U)
+#else
+ #define FREE_PTE_NR 1
+ #define tlb_fast_mode(tlb) 1
+#endif
+
+/* struct mmu_gather is an opaque type used by the mm code for passing around
+ * any data needed by arch specific code for tlb_remove_page. This structure
+ * can be per-CPU or per-MM as the page table lock is held for the duration of
+ * TLB shootdown.
+ */
+struct mmu_gather {
+ struct mm_struct *mm;
+ unsigned int nr; /* set to ~0U means fast mode */
+ unsigned int need_flush;/* Really unmapped some ptes? */
+ unsigned int fullmm; /* non-zero means full mm flush */
+ unsigned long freed;
+ struct page * pages[FREE_PTE_NR];
+};
+
+/* Users of the generic TLB shootdown code must declare this storage space. */
+DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+/* tlb_gather_mmu
+ * Return a pointer to an initialized struct mmu_gather.
+ */
+static inline struct mmu_gather *
+tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
+{
+ struct mmu_gather *tlb = &per_cpu(mmu_gathers, smp_processor_id());
+
+ tlb->mm = mm;
+
+ /* Use fast mode if only one CPU is online */
+ tlb->nr = num_online_cpus() > 1 ? 0U : ~0U;
+
+ tlb->fullmm = full_mm_flush;
+ tlb->freed = 0;
+
+ return tlb;
+}
+
+static inline void
+tlb_flush_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
+{
+ if (!tlb->need_flush)
+ return;
+ tlb->need_flush = 0;
+ tlb_flush(tlb);
+ if (!tlb_fast_mode(tlb)) {
+ free_pages_and_swap_cache(tlb->pages, tlb->nr);
+ tlb->nr = 0;
+ }
+}
+
+/* tlb_finish_mmu
+ * Called at the end of the shootdown operation to free up any resources
+ * that were required. The page table lock is still held at this point.
+ */
+static inline void
+tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
+{
+ int freed = tlb->freed;
+ struct mm_struct *mm = tlb->mm;
+ int rss = mm->rss;
+
+ if (rss < freed)
+ freed = rss;
+ mm->rss = rss - freed;
+ tlb_flush_mmu(tlb, start, end);
+
+ /* keep the page table cache within bounds */
+ check_pgt_cache();
+}
+
+
+/* void tlb_remove_page(struct mmu_gather *tlb, pte_t *ptep, unsigned long addr)
+ * Must perform the equivalent to __free_pte(pte_get_and_clear(ptep)), while
+ * handling the additional races in SMP caused by other CPUs caching valid
+ * mappings in their TLBs.
+ */
+static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
+{
+ tlb->need_flush = 1;
+ if (tlb_fast_mode(tlb)) {
+ free_page_and_swap_cache(page);
+ return;
+ }
+ tlb->pages[tlb->nr++] = page;
+ if (tlb->nr >= FREE_PTE_NR)
+ tlb_flush_mmu(tlb, 0, 0);
+}
+
+/**
+ * tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation.
+ *
+ * Record the fact that pte's were really umapped in ->need_flush, so we can
+ * later optimise away the tlb invalidate. This helps when userspace is
+ * unmapping already-unmapped pages, which happens quite a lot.
+ */
+#define tlb_remove_tlb_entry(tlb, ptep, address) \
+ do { \
+ tlb->need_flush = 1; \
+ __tlb_remove_tlb_entry(tlb, ptep, address); \
+ } while (0)
+
+#define pte_free_tlb(tlb, ptep) \
+ do { \
+ tlb->need_flush = 1; \
+ __pte_free_tlb(tlb, ptep); \
+ } while (0)
+
+#define pmd_free_tlb(tlb, pmdp) \
+ do { \
+ tlb->need_flush = 1; \
+ __pmd_free_tlb(tlb, pmdp); \
+ } while (0)

#endif
diff -urpN linux-2.5.63-bk5/include/linux/irq_cpustat.h pernode-2.5.63-bk5-1/include/linux/irq_cpustat.h
--- linux-2.5.63-bk5/include/linux/irq_cpustat.h 2003-02-24 11:05:44.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/linux/irq_cpustat.h 2003-03-02 02:55:14.000000000 -0800
@@ -17,14 +17,12 @@
* definitions instead of differing sets for each arch.
*/

-extern irq_cpustat_t irq_stat[]; /* defined in asm/hardirq.h */
+/* defined in kernel/softirq.c */
+DECLARE_PER_CPU(irq_cpustat_t, irq_stat);

#ifndef __ARCH_IRQ_STAT /* Some architectures can do this more efficiently */
-#ifdef CONFIG_SMP
-#define __IRQ_STAT(cpu, member) (irq_stat[cpu].member)
-#else
-#define __IRQ_STAT(cpu, member) ((void)(cpu), irq_stat[0].member)
-#endif
+
+#define __IRQ_STAT(cpu, member) (per_cpu(irq_stat, cpu).member)
#endif

/* arch independent irq_stat fields */
diff -urpN linux-2.5.63-bk5/include/linux/mm.h pernode-2.5.63-bk5-1/include/linux/mm.h
--- linux-2.5.63-bk5/include/linux/mm.h 2003-03-02 01:05:09.000000000 -0800
+++ pernode-2.5.63-bk5-1/include/linux/mm.h 2003-03-02 02:55:14.000000000 -0800
@@ -26,6 +26,7 @@ extern int page_cluster;
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/atomic.h>
+#include <asm/pernode.h>

/*
* Linux kernel virtual memory manager primitives.
@@ -318,11 +319,12 @@ static inline void put_page(struct page
#define ZONE_SHIFT (BITS_PER_LONG - 8)

struct zone;
-extern struct zone *zone_table[];
+DECLARE_PER_NODE(struct zone *[MAX_NR_ZONES], zone_table);

static inline struct zone *page_zone(struct page *page)
{
- return zone_table[page->flags >> ZONE_SHIFT];
+ unsigned long zone = page->flags >> ZONE_SHIFT;
+ return per_node(zone_table, zone/MAX_NR_ZONES)[zone % MAX_NR_ZONES];
}

static inline void set_page_zone(struct page *page, unsigned long zone_num)
diff -urpN linux-2.5.63-bk5/init/main.c pernode-2.5.63-bk5-1/init/main.c
--- linux-2.5.63-bk5/init/main.c 2003-02-24 11:05:11.000000000 -0800
+++ pernode-2.5.63-bk5-1/init/main.c 2003-03-02 02:55:14.000000000 -0800
@@ -29,6 +29,7 @@
#include <linux/tty.h>
#include <linux/gfp.h>
#include <linux/percpu.h>
+#include <asm/pernode.h>
#include <linux/kernel_stat.h>
#include <linux/security.h>
#include <linux/workqueue.h>
@@ -277,6 +278,10 @@ __setup("init=", init_setup);
extern void setup_arch(char **);
extern void cpu_idle(void);

+#ifndef CONFIG_NUMA
+static inline void setup_per_node_areas(void) { }
+#endif
+
#ifndef CONFIG_SMP

#ifdef CONFIG_X86_LOCAL_APIC
@@ -317,6 +322,30 @@ static void __init setup_per_cpu_areas(v
}
#endif /* !__GENERIC_PER_CPU */

+#if defined(__GENERIC_PER_NODE) && defined(CONFIG_NUMA)
+unsigned long __per_node_offset[MAX_NR_NODES];
+
+static void __init setup_per_node_areas(void)
+{
+ unsigned long size, i;
+ char *ptr;
+ /* Created by linker magic */
+ extern char __per_node_start[], __per_node_end[];
+
+ /* Copy section for each CPU (we discard the original) */
+ size = ALIGN(__per_node_end - __per_node_start, SMP_CACHE_BYTES);
+ if (!size)
+ return;
+
+ ptr = alloc_bootmem(size * MAX_NR_NODES);
+
+ for (i = 0; i < MAX_NR_NODES; i++, ptr += size) {
+ __per_node_offset[i] = ptr - __per_node_start;
+ memcpy(ptr, __per_node_start, size);
+ }
+}
+#endif /* __GENERIC_PER_NODE && CONFIG_NUMA */
+
/* Called by boot processor to activate the rest. */
static void __init smp_init(void)
{
@@ -376,6 +405,7 @@ asmlinkage void __init start_kernel(void
printk(linux_banner);
setup_arch(&command_line);
setup_per_cpu_areas();
+ setup_per_node_areas();

/*
* Mark the boot cpu "online" so that it can call console drivers in
diff -urpN linux-2.5.63-bk5/kernel/fork.c pernode-2.5.63-bk5-1/kernel/fork.c
--- linux-2.5.63-bk5/kernel/fork.c 2003-03-02 01:05:09.000000000 -0800
+++ pernode-2.5.63-bk5-1/kernel/fork.c 2003-03-02 02:55:14.000000000 -0800
@@ -58,7 +58,7 @@ rwlock_t tasklist_lock __cacheline_align
* the very last portion of sys_exit() is executed with
* preemption turned off.
*/
-static task_t *task_cache[NR_CPUS] __cacheline_aligned;
+static DEFINE_PER_CPU(task_t *, task_cache);

int nr_processes(void)
{
@@ -86,12 +86,12 @@ static void free_task_struct(struct task
} else {
int cpu = get_cpu();

- tsk = task_cache[cpu];
+ tsk = per_cpu(task_cache, cpu);
if (tsk) {
free_thread_info(tsk->thread_info);
kmem_cache_free(task_struct_cachep,tsk);
}
- task_cache[cpu] = current;
+ per_cpu(task_cache, cpu) = current;
put_cpu();
}
}
@@ -214,8 +214,8 @@ static struct task_struct *dup_task_stru
struct thread_info *ti;
int cpu = get_cpu();

- tsk = task_cache[cpu];
- task_cache[cpu] = NULL;
+ tsk = per_cpu(task_cache, cpu);
+ per_cpu(task_cache, cpu) = NULL;
put_cpu();
if (!tsk) {
ti = alloc_thread_info();
diff -urpN linux-2.5.63-bk5/kernel/ksyms.c pernode-2.5.63-bk5-1/kernel/ksyms.c
--- linux-2.5.63-bk5/kernel/ksyms.c 2003-02-24 11:05:05.000000000 -0800
+++ pernode-2.5.63-bk5-1/kernel/ksyms.c 2003-03-02 02:55:14.000000000 -0800
@@ -405,7 +405,7 @@ EXPORT_SYMBOL(add_timer);
EXPORT_SYMBOL(del_timer);
EXPORT_SYMBOL(request_irq);
EXPORT_SYMBOL(free_irq);
-EXPORT_SYMBOL(irq_stat);
+EXPORT_PER_CPU_SYMBOL(irq_stat);

/* waitqueue handling */
EXPORT_SYMBOL(add_wait_queue);
diff -urpN linux-2.5.63-bk5/kernel/sched.c pernode-2.5.63-bk5-1/kernel/sched.c
--- linux-2.5.63-bk5/kernel/sched.c 2003-02-24 11:05:40.000000000 -0800
+++ pernode-2.5.63-bk5-1/kernel/sched.c 2003-03-02 02:55:14.000000000 -0800
@@ -32,6 +32,7 @@
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/rcupdate.h>
+#include <asm/pernode.h>

/*
* Convert user-nice values [ -20 ... 0 ... 19 ]
@@ -166,9 +167,9 @@ struct runqueue {
atomic_t nr_iowait;
} ____cacheline_aligned;

-static struct runqueue runqueues[NR_CPUS] __cacheline_aligned;
+static DEFINE_PER_CPU(struct runqueue, runqueues) = {{ 0 }};

-#define cpu_rq(cpu) (runqueues + (cpu))
+#define cpu_rq(cpu) (&per_cpu(runqueues, cpu))
#define this_rq() cpu_rq(smp_processor_id())
#define task_rq(p) cpu_rq(task_cpu(p))
#define cpu_curr(cpu) (cpu_rq(cpu)->curr)
@@ -189,12 +190,11 @@ static struct runqueue runqueues[NR_CPUS
* Keep track of running tasks.
*/

-static atomic_t node_nr_running[MAX_NUMNODES] ____cacheline_maxaligned_in_smp =
- {[0 ...MAX_NUMNODES-1] = ATOMIC_INIT(0)};
+static DEFINE_PER_NODE(atomic_t, node_nr_running) = ATOMIC_INIT(0);

static inline void nr_running_init(struct runqueue *rq)
{
- rq->node_nr_running = &node_nr_running[0];
+ rq->node_nr_running = &per_node(node_nr_running, 0);
}

static inline void nr_running_inc(runqueue_t *rq)
@@ -214,7 +214,7 @@ __init void node_nr_running_init(void)
int i;

for (i = 0; i < NR_CPUS; i++)
- cpu_rq(i)->node_nr_running = &node_nr_running[cpu_to_node(i)];
+ cpu_rq(i)->node_nr_running = &per_node(node_nr_running, cpu_to_node(i));
}

#else /* !CONFIG_NUMA */
@@ -748,7 +748,7 @@ static int sched_best_cpu(struct task_st

minload = 10000000;
for (i = 0; i < numnodes; i++) {
- load = atomic_read(&node_nr_running[i]);
+ load = atomic_read(&per_node(node_nr_running, i));
if (load < minload) {
minload = load;
node = i;
@@ -790,13 +790,13 @@ static int find_busiest_node(int this_no
int i, node = -1, load, this_load, maxload;

this_load = maxload = (this_rq()->prev_node_load[this_node] >> 1)
- + atomic_read(&node_nr_running[this_node]);
+ + atomic_read(&per_node(node_nr_running, this_node));
this_rq()->prev_node_load[this_node] = this_load;
for (i = 0; i < numnodes; i++) {
if (i == this_node)
continue;
load = (this_rq()->prev_node_load[i] >> 1)
- + atomic_read(&node_nr_running[i]);
+ + atomic_read(&per_node(node_nr_running, i));
this_rq()->prev_node_load[i] = load;
if (load > maxload && (100*load > NODE_THRESHOLD*this_load)) {
maxload = load;
diff -urpN linux-2.5.63-bk5/kernel/softirq.c pernode-2.5.63-bk5-1/kernel/softirq.c
--- linux-2.5.63-bk5/kernel/softirq.c 2003-02-24 11:05:12.000000000 -0800
+++ pernode-2.5.63-bk5-1/kernel/softirq.c 2003-03-02 02:55:14.000000000 -0800
@@ -32,7 +32,7 @@
- Tasklets: serialized wrt itself.
*/

-irq_cpustat_t irq_stat[NR_CPUS] ____cacheline_aligned;
+DEFINE_PER_CPU(irq_cpustat_t, irq_stat);

static struct softirq_action softirq_vec[32] __cacheline_aligned_in_smp;

diff -urpN linux-2.5.63-bk5/mm/page_alloc.c pernode-2.5.63-bk5-1/mm/page_alloc.c
--- linux-2.5.63-bk5/mm/page_alloc.c 2003-02-24 11:05:06.000000000 -0800
+++ pernode-2.5.63-bk5-1/mm/page_alloc.c 2003-03-02 02:55:14.000000000 -0800
@@ -44,8 +44,8 @@ int sysctl_lower_zone_protection = 0;
* Used by page_zone() to look up the address of the struct zone whose
* id is encoded in the upper bits of page->flags
*/
-struct zone *zone_table[MAX_NR_ZONES*MAX_NR_NODES];
-EXPORT_SYMBOL(zone_table);
+DEFINE_PER_NODE(struct zone *[MAX_NR_ZONES], zone_table);
+EXPORT_PER_NODE_SYMBOL(zone_table);

static char *zone_names[MAX_NR_ZONES] = { "DMA", "Normal", "HighMem" };
static int zone_balance_ratio[MAX_NR_ZONES] __initdata = { 128, 128, 128, };
@@ -1170,7 +1170,7 @@ static void __init free_area_init_core(s
unsigned long size, realsize;
unsigned long batch;

- zone_table[nid * MAX_NR_ZONES + j] = zone;
+ per_node(zone_table, nid)[j] = zone;
realsize = size = zones_size[j];
if (zholes_size)
realsize -= zholes_size[j];
diff -urpN linux-2.5.63-bk5/mm/slab.c pernode-2.5.63-bk5-1/mm/slab.c
--- linux-2.5.63-bk5/mm/slab.c 2003-03-02 01:05:09.000000000 -0800
+++ pernode-2.5.63-bk5-1/mm/slab.c 2003-03-02 02:55:14.000000000 -0800
@@ -462,7 +462,7 @@ enum {
FULL
} g_cpucache_up;

-static struct timer_list reap_timers[NR_CPUS];
+static DEFINE_PER_CPU(struct timer_list, reap_timers);

static void reap_timer_fnc(unsigned long data);

@@ -516,7 +516,7 @@ static void __slab_error(const char *fun
*/
static void start_cpu_timer(int cpu)
{
- struct timer_list *rt = &reap_timers[cpu];
+ struct timer_list *rt = &per_cpu(reap_timers, cpu);

if (rt->function == NULL) {
init_timer(rt);
@@ -2180,7 +2180,7 @@ next:
static void reap_timer_fnc(unsigned long data)
{
int cpu = smp_processor_id();
- struct timer_list *rt = &reap_timers[cpu];
+ struct timer_list *rt = &per_cpu(reap_timers, cpu);

cache_reap();
mod_timer(rt, jiffies + REAPTIMEOUT_CPUC + cpu);
-
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