Thanks,
Rusty.
-- Anyone who quotes me in their sig is an idiot. -- Rusty Russell.Name: x86 Support for Non-linear CPU Numbers Patch Author: Rusty Russell Status: Tested on 2.5.21 Depends: Hotcpu/nonlinear-cpus.patch.gz
D: This patch fixes up x86 for non-linear CPU numbers.
diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/apic.c working-2.5.15-nonlinear-i386/arch/i386/kernel/apic.c --- linux-2.5.15/arch/i386/kernel/apic.c Mon Apr 29 16:00:17 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/apic.c Mon May 20 17:51:16 2002 @@ -813,10 +813,10 @@ * IRQ APIC event being in synchron with the APIC clock we * introduce an interrupt skew to spread out timer events. * - * The number of slices within a 'big' timeslice is smp_num_cpus+1 + * The number of slices within a 'big' timeslice is NR_CPUS+1 */ - slice = clocks / (smp_num_cpus+1); + slice = clocks / (NR_CPUS+1); printk("cpu: %d, clocks: %d, slice: %d\n", smp_processor_id(), clocks, slice); /* diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/apm.c working-2.5.15-nonlinear-i386/arch/i386/kernel/apm.c --- linux-2.5.15/arch/i386/kernel/apm.c Mon Apr 29 16:00:17 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/apm.c Mon May 20 17:53:54 2002 @@ -898,7 +898,7 @@ */ #ifdef CONFIG_SMP /* Some bioses don't like being called from CPU != 0 */ - while (cpu_number_map(smp_processor_id()) != 0) { + while (smp_processor_id() != 0) { kernel_thread(apm_magic, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND | SIGCHLD); schedule(); @@ -1585,7 +1585,7 @@ p = buf; - if ((smp_num_cpus == 1) && + if ((num_online_cpus() == 1) && !(error = apm_get_power_status(&bx, &cx, &dx))) { ac_line_status = (bx >> 8) & 0xff; battery_status = bx & 0xff; @@ -1715,7 +1715,7 @@ } } - if (debug && (smp_num_cpus == 1)) { + if (debug && (num_online_cpus() == 1)) { error = apm_get_power_status(&bx, &cx, &dx); if (error) printk(KERN_INFO "apm: power status not available\n"); @@ -1759,7 +1759,7 @@ pm_power_off = apm_power_off; register_sysrq_key('o', &sysrq_poweroff_op); - if (smp_num_cpus == 1) { + if (num_online_cpus() == 1) { #if defined(CONFIG_APM_DISPLAY_BLANK) && defined(CONFIG_VT) console_blank_hook = apm_console_blank; #endif @@ -1902,7 +1902,9 @@ printk(KERN_NOTICE "apm: disabled on user request.\n"); return -ENODEV; } - if ((smp_num_cpus > 1) && !power_off) { + /* FIXME: When boot code changes, this will need to be + deactivated when/if a CPU comes up --RR */ + if ((num_online_cpus() > 1) && !power_off) { printk(KERN_NOTICE "apm: disabled - APM is not SMP safe.\n"); return -ENODEV; } @@ -1956,7 +1958,9 @@ kernel_thread(apm, NULL, CLONE_FS | CLONE_FILES | CLONE_SIGHAND | SIGCHLD); - if (smp_num_cpus > 1) { + /* FIXME: When boot code changes, this will need to be + deactivated when/if a CPU comes up --RR */ + if (num_online_cpus() > 1) { printk(KERN_NOTICE "apm: disabled - APM is not SMP safe (power off active).\n"); return 0; diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/bluesmoke.c working-2.5.15-nonlinear-i386/arch/i386/kernel/bluesmoke.c --- linux-2.5.15/arch/i386/kernel/bluesmoke.c Mon Apr 29 16:00:17 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/bluesmoke.c Mon May 20 17:51:16 2002 @@ -246,7 +246,9 @@ { unsigned int i; - for (i=0; i<smp_num_cpus; i++) { + for (i=0; i<NR_CPUS; i++) { + if (!cpu_online(i)) + continue; if (i == smp_processor_id()) mce_checkregs(&i); else diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/i386_ksyms.c working-2.5.15-nonlinear-i386/arch/i386/kernel/i386_ksyms.c --- linux-2.5.15/arch/i386/kernel/i386_ksyms.c Mon Apr 15 11:47:10 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/i386_ksyms.c Mon May 20 17:51:16 2002 @@ -127,7 +127,6 @@ #ifdef CONFIG_SMP EXPORT_SYMBOL(cpu_data); EXPORT_SYMBOL(kernel_flag); -EXPORT_SYMBOL(smp_num_cpus); EXPORT_SYMBOL(cpu_online_map); EXPORT_SYMBOL_NOVERS(__write_lock_failed); EXPORT_SYMBOL_NOVERS(__read_lock_failed); diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/io_apic.c working-2.5.15-nonlinear-i386/arch/i386/kernel/io_apic.c --- linux-2.5.15/arch/i386/kernel/io_apic.c Tue Apr 23 11:39:32 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/io_apic.c Mon May 20 17:51:16 2002 @@ -230,14 +230,14 @@ inside: if (direction == 1) { cpu++; - if (cpu >= smp_num_cpus) + if (cpu >= NR_CPUS) cpu = 0; } else { cpu--; if (cpu == -1) - cpu = smp_num_cpus-1; + cpu = NR_CPUS-1; } - } while (!IRQ_ALLOWED(cpu,allowed_mask) || + } while (!cpu_online(cpu) || !IRQ_ALLOWED(cpu,allowed_mask) || (search_idle && !IDLE_ENOUGH(cpu,now))); return cpu; diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/irq.c working-2.5.15-nonlinear-i386/arch/i386/kernel/irq.c --- linux-2.5.15/arch/i386/kernel/irq.c Tue Apr 23 11:39:32 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/irq.c Mon May 20 17:51:16 2002 @@ -138,8 +138,9 @@ struct irqaction * action; seq_printf(p, " "); - for (j=0; j<smp_num_cpus; j++) - seq_printf(p, "CPU%d ",j); + for (j=0; j<NR_CPUS; j++) + if (cpu_online(j)) + p += seq_printf(p, "CPU%d ",j); seq_putc(p, '\n'); for (i = 0 ; i < NR_IRQS ; i++) { @@ -150,9 +151,10 @@ #ifndef CONFIG_SMP seq_printf(p, "%10u ", kstat_irqs(i)); #else - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", - kstat.irqs[cpu_logical_map(j)][i]); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + p += seq_printf(p, "%10u ", + kstat.irqs[j][i]); #endif seq_printf(p, " %14s", irq_desc[i].handler->typename); seq_printf(p, " %s", action->name); @@ -162,13 +164,15 @@ seq_putc(p, '\n'); } seq_printf(p, "NMI: "); - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", nmi_count(cpu_logical_map(j))); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + p += seq_printf(p, "%10u ", nmi_count(j)); seq_putc(p, '\n'); #if CONFIG_X86_LOCAL_APIC seq_printf(p, "LOC: "); - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", apic_timer_irqs[cpu_logical_map(j)]); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + p += seq_printf(p, "%10u ", apic_timer_irqs[j]); seq_putc(p, '\n'); #endif seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count)); @@ -198,14 +202,14 @@ printk("\n%s, CPU %d:\n", str, cpu); printk("irq: %d [",irqs_running()); - for(i=0;i < smp_num_cpus;i++) + for(i=0;i < NR_CPUS;i++) printk(" %d",local_irq_count(i)); printk(" ]\nbh: %d [",spin_is_locked(&global_bh_lock) ? 1 : 0); - for(i=0;i < smp_num_cpus;i++) + for(i=0;i < NR_CPUS;i++) printk(" %d",local_bh_count(i)); printk(" ]\nStack dumps:"); - for(i = 0; i < smp_num_cpus; i++) { + for(i = 0; i < NR_CPUS; i++) { unsigned long esp; if (i == cpu) continue; diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/microcode.c working-2.5.15-nonlinear-i386/arch/i386/kernel/microcode.c --- linux-2.5.15/arch/i386/kernel/microcode.c Mon May 6 11:11:51 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/microcode.c Mon May 20 17:51:16 2002 @@ -188,7 +188,7 @@ } do_update_one(NULL); - for (i=0; i<smp_num_cpus; i++) { + for (i=0; i<NR_CPUS; i++) { err = update_req[i].err; error += err; if (!err) { @@ -343,8 +343,8 @@ } down_write(µcode_rwsem); if (!mc_applied) { - mc_applied = kmalloc(smp_num_cpus*sizeof(struct microcode), - GFP_KERNEL); + mc_applied = kmalloc(NR_CPUS*sizeof(struct microcode), + GFP_KERNEL); if (!mc_applied) { up_write(µcode_rwsem); printk(KERN_ERR "microcode: out of memory for saved microcode\n"); @@ -368,7 +368,7 @@ ret = -EIO; goto out_fsize; } else { - mc_fsize = smp_num_cpus * sizeof(struct microcode); + mc_fsize = NR_CPUS * sizeof(struct microcode); ret = (ssize_t)len; } out_fsize: @@ -386,7 +386,7 @@ case MICROCODE_IOCFREE: down_write(µcode_rwsem); if (mc_applied) { - int bytes = smp_num_cpus * sizeof(struct microcode); + int bytes = NR_CPUS * sizeof(struct microcode); devfs_set_file_size(devfs_handle, 0); kfree(mc_applied); diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/mtrr.c working-2.5.15-nonlinear-i386/arch/i386/kernel/mtrr.c --- linux-2.5.15/arch/i386/kernel/mtrr.c Mon May 13 12:00:30 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/mtrr.c Mon May 20 17:51:16 2002 @@ -1055,7 +1055,7 @@ wait_barrier_cache_disable = TRUE; wait_barrier_execute = TRUE; wait_barrier_cache_enable = TRUE; - atomic_set (&undone_count, smp_num_cpus - 1); + atomic_set (&undone_count, num_online_cpus() - 1); /* Start the ball rolling on other CPUs */ if (smp_call_function (ipi_handler, &data, 1, 0) != 0) panic ("mtrr: timed out waiting for other CPUs\n"); @@ -1064,14 +1064,14 @@ /* Wait for all other CPUs to flush and disable their caches */ while (atomic_read (&undone_count) > 0) { rep_nop(); barrier(); } /* Set up for completion wait and then release other CPUs to change MTRRs*/ - atomic_set (&undone_count, smp_num_cpus - 1); + atomic_set (&undone_count, num_online_cpus() - 1); wait_barrier_cache_disable = FALSE; set_mtrr_cache_disable (&ctxt); /* Wait for all other CPUs to flush and disable their caches */ while (atomic_read (&undone_count) > 0) { rep_nop(); barrier(); } /* Set up for completion wait and then release other CPUs to change MTRRs*/ - atomic_set (&undone_count, smp_num_cpus - 1); + atomic_set (&undone_count, num_online_cpus() - 1); wait_barrier_execute = FALSE; (*set_mtrr_up) (reg, base, size, type, FALSE); /* Now wait for other CPUs to complete the function */ diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/nmi.c working-2.5.15-nonlinear-i386/arch/i386/kernel/nmi.c --- linux-2.5.15/arch/i386/kernel/nmi.c Mon Apr 15 11:47:10 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/nmi.c Mon May 20 17:51:16 2002 @@ -81,8 +81,9 @@ sti(); mdelay((10*1000)/nmi_hz); // wait 10 ticks - for (j = 0; j < smp_num_cpus; j++) { - cpu = cpu_logical_map(j); + for (cpu = 0; cpu < NR_CPUS; cpu++) { + if (!cpu_online(cpu)) + continue; if (nmi_count(cpu) - tmp[cpu].__nmi_count <= 5) { printk("CPU#%d: NMI appears to be stuck!\n", cpu); return -1; @@ -330,7 +331,7 @@ * Just reset the alert counters, (other CPUs might be * spinning on locks we hold): */ - for (i = 0; i < smp_num_cpus; i++) + for (i = 0; i < NR_CPUS; i++) alert_counter[i] = 0; } diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/smp.c working-2.5.15-nonlinear-i386/arch/i386/kernel/smp.c --- linux-2.5.15/arch/i386/kernel/smp.c Mon Apr 15 11:47:10 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/smp.c Mon May 20 17:51:17 2002 @@ -247,18 +247,16 @@ * we get an APIC send error if we try to broadcast. * thus we have to avoid sending IPIs in this case. */ - if (!(smp_num_cpus > 1)) + if (!(num_online_cpus() > 1)) return; if (clustered_apic_mode) { // Pointless. Use send_IPI_mask to do this instead int cpu; - if (smp_num_cpus > 1) { - for (cpu = 0; cpu < smp_num_cpus; ++cpu) { - if (cpu != smp_processor_id()) - send_IPI_mask(1 << cpu, vector); - } + for (cpu = 0; cpu < NR_CPUS; ++cpu) { + if (cpu_online(cpu) && cpu != smp_processor_id()) + send_IPI_mask(1 << cpu, vector); } } else { __send_IPI_shortcut(APIC_DEST_ALLBUT, vector); @@ -272,7 +270,9 @@ // Pointless. Use send_IPI_mask to do this instead int cpu; - for (cpu = 0; cpu < smp_num_cpus; ++cpu) { + for (cpu = 0; cpu < NR_CPUS; ++cpu) { + if (!cpu_online(cpu)) + continue; send_IPI_mask(1 << cpu, vector); } } else { @@ -544,7 +544,7 @@ */ { struct call_data_struct data; - int cpus = smp_num_cpus-1; + int cpus = num_online_cpus()-1; if (!cpus) return 0; @@ -594,7 +594,6 @@ void smp_send_stop(void) { smp_call_function(stop_this_cpu, NULL, 1, 0); - smp_num_cpus = 1; __cli(); disable_local_APIC(); diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/arch/i386/kernel/smpboot.c working-2.5.15-nonlinear-i386/arch/i386/kernel/smpboot.c --- linux-2.5.15/arch/i386/kernel/smpboot.c Mon Apr 15 11:47:10 2002 +++ working-2.5.15-nonlinear-i386/arch/i386/kernel/smpboot.c Mon May 20 17:51:17 2002 @@ -56,9 +56,6 @@ /* Setup configured maximum number of CPUs to activate */ static int max_cpus = -1; -/* Total count of live CPUs */ -int smp_num_cpus = 1; - /* Number of siblings per CPU package */ int smp_num_siblings = 1; int __initdata phys_proc_id[NR_CPUS]; /* Package ID of each logical CPU */ @@ -287,7 +284,8 @@ /* * all APs synchronize but they loop on '== num_cpus' */ - while (atomic_read(&tsc_count_start) != smp_num_cpus-1) mb(); + while (atomic_read(&tsc_count_start) != num_online_cpus()-1) + mb(); atomic_set(&tsc_count_stop, 0); wmb(); /* @@ -305,21 +303,26 @@ /* * Wait for all APs to leave the synchronization point: */ - while (atomic_read(&tsc_count_stop) != smp_num_cpus-1) mb(); + while (atomic_read(&tsc_count_stop) != num_online_cpus()-1) + mb(); atomic_set(&tsc_count_start, 0); wmb(); atomic_inc(&tsc_count_stop); } sum = 0; - for (i = 0; i < smp_num_cpus; i++) { - t0 = tsc_values[i]; - sum += t0; + for (i = 0; i < NR_CPUS; i++) { + if (cpu_online(i)) { + t0 = tsc_values[i]; + sum += t0; + } } - avg = div64(sum, smp_num_cpus); + avg = div64(sum, num_online_cpus()); sum = 0; - for (i = 0; i < smp_num_cpus; i++) { + for (i = 0; i < NR_CPUS; i++) { + if (!cpu_online(i)) + continue; delta = tsc_values[i] - avg; if (delta < 0) delta = -delta; @@ -351,7 +354,7 @@ int i; /* - * smp_num_cpus is not necessarily known at the time + * num_online_cpus is not necessarily known at the time * this gets called, so we first wait for the BP to * finish SMP initialization: */ @@ -359,14 +362,15 @@ for (i = 0; i < NR_LOOPS; i++) { atomic_inc(&tsc_count_start); - while (atomic_read(&tsc_count_start) != smp_num_cpus) mb(); + while (atomic_read(&tsc_count_start) != num_online_cpus()) + mb(); rdtscll(tsc_values[smp_processor_id()]); if (i == NR_LOOPS-1) write_tsc(0, 0); atomic_inc(&tsc_count_stop); - while (atomic_read(&tsc_count_stop) != smp_num_cpus) mb(); + while (atomic_read(&tsc_count_stop) != num_online_cpus()) mb(); } } #undef NR_LOOPS @@ -1068,7 +1072,6 @@ io_apic_irqs = 0; #endif cpu_online_map = phys_cpu_present_map = 1; - smp_num_cpus = 1; if (APIC_init_uniprocessor()) printk(KERN_NOTICE "Local APIC not detected." " Using dummy APIC emulation.\n"); @@ -1099,7 +1102,6 @@ io_apic_irqs = 0; #endif cpu_online_map = phys_cpu_present_map = 1; - smp_num_cpus = 1; goto smp_done; } @@ -1115,7 +1117,6 @@ io_apic_irqs = 0; #endif cpu_online_map = phys_cpu_present_map = 1; - smp_num_cpus = 1; goto smp_done; } @@ -1196,7 +1197,6 @@ (bogosum/(5000/HZ))%100); Dprintk("Before bogocount - setting activated=1.\n"); } - smp_num_cpus = cpucount + 1; if (smp_b_stepping) printk(KERN_WARNING "WARNING: SMP operation may be unreliable with B stepping processors.\n"); @@ -1211,11 +1211,12 @@ for (cpu = 0; cpu < NR_CPUS; cpu++) cpu_sibling_map[cpu] = NO_PROC_ID; - for (cpu = 0; cpu < smp_num_cpus; cpu++) { + for (cpu = 0; cpu < NR_CPUS; cpu++) { int i; - - for (i = 0; i < smp_num_cpus; i++) { - if (i == cpu) + if (!cpu_online(cpu)) continue; + + for (i = 0; i < NR_CPUS; i++) { + if (i == cpu || !cpu_online(i)) continue; if (phys_proc_id[cpu] == phys_proc_id[i]) { cpu_sibling_map[cpu] = i; diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/include/asm-i386/hardirq.h working-2.5.15-nonlinear-i386/include/asm-i386/hardirq.h --- linux-2.5.15/include/asm-i386/hardirq.h Tue Apr 23 11:39:38 2002 +++ working-2.5.15-nonlinear-i386/include/asm-i386/hardirq.h Mon May 20 17:51:17 2002 @@ -51,7 +51,7 @@ { int i; - for (i = 0; i < smp_num_cpus; i++) + for (i = 0; i < NR_CPUS; i++) if (local_irq_count(i)) return 1; return 0; diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.5.15/include/asm-i386/smp.h working-2.5.15-nonlinear-i386/include/asm-i386/smp.h --- linux-2.5.15/include/asm-i386/smp.h Wed Feb 20 17:56:40 2002 +++ working-2.5.15-nonlinear-i386/include/asm-i386/smp.h Mon May 20 17:51:17 2002 @@ -69,20 +69,6 @@ extern void zap_low_mappings (void); /* - * On x86 all CPUs are mapped 1:1 to the APIC space. - * This simplifies scheduling and IPI sending and - * compresses data structures. - */ -static inline int cpu_logical_map(int cpu) -{ - return cpu; -} -static inline int cpu_number_map(int cpu) -{ - return cpu; -} - -/* * Some lowlevel functions might want to know about * the real APIC ID <-> CPU # mapping. */ @@ -104,9 +90,23 @@ * from the initial startup. We map APIC_BASE very early in page_setup(), * so this is correct in the x86 case. */ - #define smp_processor_id() (current_thread_info()->cpu) +#define cpu_online(cpu) (cpu_online_map & (1<<(cpu))) + +extern inline unsigned int num_online_cpus(void) +{ + return hweight32(cpu_online_map); +} + +extern inline int any_online_cpu(unsigned int mask) +{ + if (mask & cpu_online_map) + return __ffs(mask & cpu_online_map); + + return -1; +} + static __inline int hard_smp_processor_id(void) { /* we don't want to mark this access volatile - bad code generation */
Name: PPC Support for Non-linear CPU Numbers Patch Author: Rusty Russell Status: Tested on 2.5.15 PPC Depends: Hotcpu/nonlinear-cpus.patch.gz
D: This patch fixes up PPC for non-linear CPU numbers.
diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/kernel/irq.c working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/irq.c --- working-ppc-2.5-smp/arch/ppc/kernel/irq.c Fri Feb 15 22:21:09 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/irq.c Thu May 23 19:55:01 2002 @@ -370,8 +370,9 @@ struct irqaction * action; seq_puts(p, " "); - for (j=0; j<smp_num_cpus; j++) - seq_printf(p, "CPU%d ", j); + for (j=0; j<NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "CPU%d ", j); seq_putc(p, '\n'); for (i = 0 ; i < NR_IRQS ; i++) { @@ -380,9 +381,10 @@ continue; seq_printf(p, "%3d: ", i); #ifdef CONFIG_SMP - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", - kstat.irqs[cpu_logical_map(j)][i]); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "%10u ", + kstat.irqs[j][i]); #else seq_printf(p, "%10u ", kstat_irqs(i)); #endif /* CONFIG_SMP */ @@ -399,8 +401,9 @@ #ifdef CONFIG_TAU_INT if (tau_initialized){ seq_puts(p, "TAU: "); - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", tau_interrupts(j)); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "%10u ", tau_interrupts(j)); seq_puts(p, " PowerPC Thermal Assist (cpu temp)\n"); } #endif diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/kernel/open_pic.c working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/open_pic.c --- working-ppc-2.5-smp/arch/ppc/kernel/open_pic.c Mon May 13 08:54:21 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/open_pic.c Thu May 23 18:23:50 2002 @@ -519,8 +519,9 @@ int i; u32 mask = 0; - for (i = 0; i < smp_num_cpus; ++i, cpumask >>= 1) - mask |= (cpumask & 1) << smp_hw_index[i]; + for (i = 0; i < NR_CPUS; ++i, cpumask >>= 1) + if (cpu_online(i)) + mask |= (cpumask & 1) << smp_hw_index[i]; return mask; } #else diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/kernel/ppc_ksyms.c working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/ppc_ksyms.c --- working-ppc-2.5-smp/arch/ppc/kernel/ppc_ksyms.c Thu May 9 20:19:54 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/ppc_ksyms.c Thu May 23 15:31:25 2002 @@ -228,7 +228,6 @@ #endif EXPORT_SYMBOL(smp_call_function); EXPORT_SYMBOL(smp_hw_index); -EXPORT_SYMBOL(smp_num_cpus); EXPORT_SYMBOL(synchronize_irq); #endif diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/kernel/setup.c working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/setup.c --- working-ppc-2.5-smp/arch/ppc/kernel/setup.c Thu May 9 20:19:54 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/setup.c Thu May 23 15:33:44 2002 @@ -146,8 +146,8 @@ /* Show summary information */ #ifdef CONFIG_SMP unsigned long bogosum = 0; - for (i = 0; i < smp_num_cpus; ++i) - if (cpu_online_map & (1 << i)) + for (i = 0; i < NR_CPUS; ++i) + if (cpu_online(i)) bogosum += cpu_data[i].loops_per_jiffy; seq_printf(m, "total bogomips\t: %lu.%02lu\n", bogosum/(500000/HZ), bogosum/(5000/HZ) % 100); diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/kernel/smp.c working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/smp.c --- working-ppc-2.5-smp/arch/ppc/kernel/smp.c Wed Apr 10 22:07:21 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/kernel/smp.c Thu May 23 18:23:00 2002 @@ -42,7 +42,6 @@ int smp_threads_ready; volatile int smp_commenced; -int smp_num_cpus = 1; int smp_tb_synchronized; struct cpuinfo_PPC cpu_data[NR_CPUS]; struct klock_info_struct klock_info = { KLOCK_CLEAR, 0 }; @@ -68,7 +67,6 @@ int start_secondary(void *); extern int cpu_idle(void *unused); void smp_call_function_interrupt(void); -void smp_message_pass(int target, int msg, unsigned long data, int wait); static int __smp_call_function(void (*func) (void *info), void *info, int wait, int target); @@ -174,7 +172,6 @@ void smp_send_stop(void) { smp_call_function(stop_this_cpu, NULL, 1, 0); - smp_num_cpus = 1; } /* @@ -212,7 +209,9 @@ * hardware interrupt handler, you may call it from a bottom half handler. */ { - if (smp_num_cpus <= 1) + /* FIXME: get cpu lock with hotplug cpus, or change this to + bitmask. --RR */ + if (num_online_cpus() <= 1) return 0; return __smp_call_function(func, info, wait, MSG_ALL_BUT_SELF); } @@ -226,9 +225,9 @@ int ncpus = 1; if (target == MSG_ALL_BUT_SELF) - ncpus = smp_num_cpus - 1; + ncpus = num_online_cpus() - 1; else if (target == MSG_ALL) - ncpus = smp_num_cpus; + ncpus = num_online_cpus(); data.func = func; data.info = info; @@ -298,7 +297,6 @@ struct task_struct *p; printk("Entering SMP Mode...\n"); - smp_num_cpus = 1; smp_store_cpu_info(0); cpu_online_map = 1UL; @@ -377,7 +375,6 @@ sprintf(buf, "found cpu %d", i); if (ppc_md.progress) ppc_md.progress(buf, 0x350+i); printk("Processor %d found.\n", i); - smp_num_cpus++; } else { char buf[32]; sprintf(buf, "didn't find cpu %d", i); @@ -389,7 +386,8 @@ /* Setup CPU 0 last (important) */ smp_ops->setup_cpu(0); - if (smp_num_cpus < 2) + /* FIXME: Not with hotplug CPUS --RR */ + if (num_online_cpus() < 2) smp_tb_synchronized = 1; } @@ -415,7 +413,7 @@ for (pass = 2; pass < 2+PASSES; pass++){ if (cpu == 0){ mb(); - for (i = j = 1; i < smp_num_cpus; i++, j++){ + for (i = j = 1; i < NR_CPUS; i++, j++){ /* skip stuck cpus */ while (!cpu_callin_map[j]) ++j; @@ -489,7 +487,8 @@ * * NOTE2: this code doesn't seem to work on > 2 cpus. -- paulus/BenH */ - if (!smp_tb_synchronized && smp_num_cpus == 2) { + /* FIXME: This doesn't work with hotplug CPUs --RR */ + if (!smp_tb_synchronized && num_online_cpus() == 2) { unsigned long flags; __save_and_cli(flags); smp_software_tb_sync(0); @@ -503,24 +502,18 @@ smp_store_cpu_info(cpu); set_dec(tb_ticks_per_jiffy); + /* Set online before we acknowledge. */ + set_bit(cpu, &cpu_online_map); + wmb(); cpu_callin_map[cpu] = 1; smp_ops->setup_cpu(cpu); - /* - * This cpu is now "online". Only set them online - * before they enter the loop below since write access - * to the below variable is _not_ guaranteed to be - * atomic. - * -- Cort <cort@fsmlabs.com> - */ - cpu_online_map |= 1UL << smp_processor_id(); - while (!smp_commenced) barrier(); /* see smp_commence for more info */ - if (!smp_tb_synchronized && smp_num_cpus == 2) { + if (!smp_tb_synchronized && num_online_cpus() == 2) { smp_software_tb_sync(cpu); } __sti(); diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/platforms/chrp_smp.c working-ppc-2.5-pre-hotcpu/arch/ppc/platforms/chrp_smp.c --- working-ppc-2.5-smp/arch/ppc/platforms/chrp_smp.c Sun Feb 10 22:41:24 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/platforms/chrp_smp.c Thu May 23 16:04:30 2002 @@ -63,9 +63,10 @@ static atomic_t ready = ATOMIC_INIT(1); static volatile int frozen = 0; + /* FIXME: Hotplug cpu breaks all this --RR */ if (cpu_nr == 0) { /* wait for all the others */ - while (atomic_read(&ready) < smp_num_cpus) + while (atomic_read(&ready) < num_online_cpus()) barrier(); atomic_set(&ready, 1); /* freeze the timebase */ @@ -75,7 +76,7 @@ /* XXX assumes this is not a 601 */ set_tb(0, 0); last_jiffy_stamp(0) = 0; - while (atomic_read(&ready) < smp_num_cpus) + while (atomic_read(&ready) < num_online_cpus()) barrier(); /* thaw the timebase again */ call_rtas("thaw-time-base", 0, 1, NULL); diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/platforms/iSeries_smp.c working-ppc-2.5-pre-hotcpu/arch/ppc/platforms/iSeries_smp.c --- working-ppc-2.5-smp/arch/ppc/platforms/iSeries_smp.c Sun Feb 10 22:22:35 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/platforms/iSeries_smp.c Thu May 23 16:05:09 2002 @@ -50,7 +50,7 @@ int cpu = smp_processor_id(); int msg; - if ( smp_num_cpus < 2 ) + if ( num_online_cpus() < 2 ) return; for ( msg = 0; msg < 4; ++msg ) @@ -62,7 +62,10 @@ static void smp_iSeries_message_pass(int target, int msg, unsigned long data, int wait) { int i; - for (i = 0; i < smp_num_cpus; ++i) { + for (i = 0; i < NR_CPUS; ++i) { + if (!cpu_online(i)) + continue; + if ( (target == MSG_ALL) || (target == i) || ((target == MSG_ALL_BUT_SELF) && (i != smp_processor_id())) ) { diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/arch/ppc/platforms/pmac_smp.c working-ppc-2.5-pre-hotcpu/arch/ppc/platforms/pmac_smp.c --- working-ppc-2.5-smp/arch/ppc/platforms/pmac_smp.c Thu May 9 20:19:54 2002 +++ working-ppc-2.5-pre-hotcpu/arch/ppc/platforms/pmac_smp.c Thu May 23 16:06:11 2002 @@ -282,7 +282,7 @@ /* clear interrupt */ psurge_clr_ipi(cpu); - if (smp_num_cpus < 2) + if (num_online_cpus() < 2) return; /* make sure there is a message there */ @@ -302,10 +302,12 @@ { int i; - if (smp_num_cpus < 2) + if (num_online_cpus() < 2) return; - for (i = 0; i < smp_num_cpus; i++) { + for (i = 0; i < NR_CPUS; i++) { + if (!cpu_online(i)) + continue; if (target == MSG_ALL || (target == MSG_ALL_BUT_SELF && i != smp_processor_id()) || target == i) { @@ -497,7 +499,7 @@ { if (cpu_nr == 0) { - if (smp_num_cpus < 2) + if (num_online_cpus() < 2) return; /* reset the entry point so if we get another intr we won't * try to startup again */ diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/include/asm-ppc/hardirq.h working-ppc-2.5-pre-hotcpu/include/asm-ppc/hardirq.h --- working-ppc-2.5-smp/include/asm-ppc/hardirq.h Thu May 9 20:19:54 2002 +++ working-ppc-2.5-pre-hotcpu/include/asm-ppc/hardirq.h Thu May 23 18:03:30 2002 @@ -56,7 +56,7 @@ { int i; - for (i = 0; i < smp_num_cpus; i++) + for (i = 0; i < NR_CPUS; i++) if (local_irq_count(i)) return 1; return 0; diff -urN -I \$.*\$ --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-ppc-2.5-smp/include/asm-ppc/smp.h working-ppc-2.5-pre-hotcpu/include/asm-ppc/smp.h --- working-ppc-2.5-smp/include/asm-ppc/smp.h Fri Feb 15 22:21:09 2002 +++ working-ppc-2.5-pre-hotcpu/include/asm-ppc/smp.h Thu May 23 18:03:18 2002 @@ -15,6 +15,7 @@ #include <linux/config.h> #include <linux/kernel.h> +#include <linux/bitops.h> #ifdef CONFIG_SMP @@ -44,11 +45,22 @@ #define NO_PROC_ID 0xFF /* No processor magic marker */ #define PROC_CHANGE_PENALTY 20 -/* 1 to 1 mapping on PPC -- Cort */ -#define cpu_logical_map(cpu) (cpu) -#define cpu_number_map(x) (x) - #define smp_processor_id() (current_thread_info()->cpu) + +#define cpu_online(cpu) (cpu_online_map & (1<<(cpu))) + +extern inline unsigned int num_online_cpus(void) +{ + return hweight32(cpu_online_map); +} + +extern inline int any_online_cpu(unsigned int mask) +{ + if (mask & cpu_online_map) + return __ffs(mask & cpu_online_map); + + return -1; +} extern int smp_hw_index[]; #define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
Name: ia64 Support for Non-linear CPU Numbers Patch Author: Kimio Suganuma Status: Tested on 2.5.14 Depends: Hotcpu/nonlinear-cpus.patch.gz
D: This patch fixes up ia64 for non-linear CPU numbers.
diff -Nur linux-2.5.10-base/arch/ia64/kernel/ia64_ksyms.c linux-2.5.10-new/arch/ia64/kernel/ia64_ksyms.c --- linux-2.5.10-base/arch/ia64/kernel/ia64_ksyms.c Wed May 8 17:51:03 2002 +++ linux-2.5.10-new/arch/ia64/kernel/ia64_ksyms.c Wed May 8 17:58:55 2002 @@ -85,9 +85,6 @@ EXPORT_SYMBOL(cpu_online_map); EXPORT_SYMBOL(ia64_cpu_to_sapicid); -#include <linux/smp.h> -EXPORT_SYMBOL(smp_num_cpus); - #include <asm/smplock.h> EXPORT_SYMBOL(kernel_flag); diff -Nur linux-2.5.10-base/arch/ia64/kernel/iosapic.c linux-2.5.10-new/arch/ia64/kernel/iosapic.c --- linux-2.5.10-base/arch/ia64/kernel/iosapic.c Wed May 8 17:51:03 2002 +++ linux-2.5.10-new/arch/ia64/kernel/iosapic.c Wed May 8 17:58:55 2002 @@ -254,7 +254,7 @@ char *addr; int redir = (irq & (1<<31)) ? 1 : 0; - mask &= (1UL << smp_num_cpus) - 1; + mask &= cpu_online_map; if (!mask || irq >= IA64_NUM_VECTORS) return; @@ -757,9 +757,8 @@ set_rte(vector, cpu_physical_id(cpu_index) & 0xffff); - cpu_index++; - if (cpu_index >= smp_num_cpus) - cpu_index = 0; + for (cpu_index++; !cpu_online(cpu_index % NR_CPUS); cpu_index++); + cpu_index %= NR_CPUS; } else { /* * Direct the interrupt vector to the current cpu, diff -Nur linux-2.5.10-base/arch/ia64/kernel/irq.c linux-2.5.10-new/arch/ia64/kernel/irq.c --- linux-2.5.10-base/arch/ia64/kernel/irq.c Wed May 8 17:51:03 2002 +++ linux-2.5.10-new/arch/ia64/kernel/irq.c Wed May 8 17:58:55 2002 @@ -156,8 +156,9 @@ irq_desc_t *idesc; seq_puts(p, " "); - for (j=0; j<smp_num_cpus; j++) - seq_printf(p, "CPU%d ",j); + for (j=0; j<NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "CPU%d ",j); seq_putc(p, '\n'); for (i = 0 ; i < NR_IRQS ; i++) { @@ -169,9 +170,9 @@ #ifndef CONFIG_SMP seq_printf(p, "%10u ", kstat_irqs(i)); #else - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", - kstat.irqs[cpu_logical_map(j)][i]); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "%10u ", kstat.irqs[j][i]); #endif seq_printf(p, " %14s", idesc->handler->typename); seq_printf(p, " %s", action->name); @@ -181,15 +182,15 @@ seq_putc(p, '\n'); } seq_puts(p, "NMI: "); - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", - nmi_count(cpu_logical_map(j))); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "%10u ", nmi_count(j)); seq_putc(p, '\n'); #if defined(CONFIG_SMP) && defined(CONFIG_X86) seq_puts(p, "LOC: "); - for (j = 0; j < smp_num_cpus; j++) - seq_printf(p, "%10u ", - apic_timer_irqs[cpu_logical_map(j)]); + for (j = 0; j < NR_CPUS; j++) + if (cpu_online(j)) + seq_printf(p, "%10u ", apic_timer_irqs[j]); seq_putc(p, '\n'); #endif seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count)); @@ -218,10 +219,10 @@ printk("\n%s, CPU %d:\n", str, cpu); printk("irq: %d [",irqs_running()); - for(i=0;i < smp_num_cpus;i++) + for(i=0;i < NR_CPUS;i++) printk(" %d",irq_count(i)); printk(" ]\nbh: %d [",spin_is_locked(&global_bh_lock) ? 1 : 0); - for(i=0;i < smp_num_cpus;i++) + for(i=0;i < NR_CPUS;i++) printk(" %d",bh_count(i)); printk(" ]\nStack dumps:"); @@ -233,7 +234,7 @@ * idea. */ #elif defined(CONFIG_X86) - for(i=0;i< smp_num_cpus;i++) { + for(i=0;i< NR_CPUS;i++) { unsigned long esp; if(i==cpu) continue; diff -Nur linux-2.5.10-base/arch/ia64/kernel/mca.c linux-2.5.10-new/arch/ia64/kernel/mca.c --- linux-2.5.10-base/arch/ia64/kernel/mca.c Wed May 8 17:51:03 2002 +++ linux-2.5.10-new/arch/ia64/kernel/mca.c Wed May 8 17:58:55 2002 @@ -604,9 +604,12 @@ int cpu; /* Clear the Rendez checkin flag for all cpus */ - for(cpu = 0; cpu < smp_num_cpus; cpu++) + for(cpu = 0; cpu < NR_CPUS; cpu++) { + if (!cpu_online(cpu)) + continue; if (ia64_mc_info.imi_rendez_checkin[cpu] == IA64_MCA_RENDEZ_CHECKIN_DONE) ia64_mca_wakeup(cpu); + } } diff -Nur linux-2.5.10-base/arch/ia64/kernel/perfmon.c linux-2.5.10-new/arch/ia64/kernel/perfmon.c --- linux-2.5.10-base/arch/ia64/kernel/perfmon.c Wed May 8 17:51:03 2002 +++ linux-2.5.10-new/arch/ia64/kernel/perfmon.c Wed May 8 17:58:55 2002 @@ -805,7 +805,7 @@ * and it must be a valid CPU */ cpu = ffs(pfx->ctx_cpu_mask); - if (cpu > smp_num_cpus) { + if (!cpu_online(cpu)) { DBprintk(("CPU%d is not online\n", cpu)); return -EINVAL; } diff -Nur linux-2.5.10-base/arch/ia64/kernel/smp.c linux-2.5.10-new/arch/ia64/kernel/smp.c --- linux-2.5.10-base/arch/ia64/kernel/smp.c Wed May 8 17:51:03 2002 +++ linux-2.5.10-new/arch/ia64/kernel/smp.c Wed May 8 17:58:55 2002 @@ -168,8 +168,8 @@ { int i; - for (i = 0; i < smp_num_cpus; i++) { - if (i != smp_processor_id()) + for (i = 0; i < NR_CPUS; i++) { + if (cpu_online(i) && i != smp_processor_id()) send_IPI_single(i, op); } } @@ -179,8 +179,9 @@ { int i; - for (i = 0; i < smp_num_cpus; i++) - send_IPI_single(i, op); + for (i = 0; i < NR_CPUS; i++) + if (cpu_online(i)) + send_IPI_single(i, op); } static inline void @@ -205,8 +206,8 @@ { int i; - for (i = 0; i < smp_num_cpus; i++) - if (i != smp_processor_id()) + for (i = 0; i < NR_CPUS; i++) + if (cpu_online(i) && i != smp_processor_id()) smp_send_reschedule(i); } @@ -290,7 +291,7 @@ smp_call_function (void (*func) (void *info), void *info, int nonatomic, int wait) { struct call_data_struct data; - int cpus = smp_num_cpus-1; + int cpus = num_online_cpus()-1; if (!cpus) return 0; @@ -339,7 +340,6 @@ smp_send_stop (void) { send_IPI_allbutself(IPI_CPU_STOP); - smp_num_cpus = 1; } int __init diff -Nur linux-2.5.10-base/arch/ia64/kernel/smpboot.c linux-2.5.10-new/arch/ia64/kernel/smpboot.c --- linux-2.5.10-base/arch/ia64/kernel/smpboot.c Wed May 8 17:51:03 2002 +++ linux-2.5.10-new/arch/ia64/kernel/smpboot.c Wed May 8 17:58:55 2002 @@ -76,9 +76,6 @@ /* Setup configured maximum number of CPUs to activate */ static int max_cpus = -1; -/* Total count of live CPUs */ -int smp_num_cpus = 1; - /* Bitmask of currently online CPUs */ volatile unsigned long cpu_online_map; @@ -508,7 +505,6 @@ if (!max_cpus || (max_cpus < -1)) { printk(KERN_INFO "SMP mode deactivated.\n"); cpu_online_map = 1; - smp_num_cpus = 1; goto smp_done; } if (max_cpus != -1) @@ -538,8 +534,6 @@ printk("phys CPU#%d not responding - cannot use it.\n", cpu); } - smp_num_cpus = cpucount + 1; - /* * Allow the user to impress friends. */ @@ -584,6 +578,5 @@ printk("SMP: Can't set SAL AP Boot Rendezvous: %s\n Forcing UP mode\n", ia64_sal_strerror(sal_ret)); max_cpus = 0; - smp_num_cpus = 1; } } diff -Nur linux-2.5.10-base/arch/ia64/sn/io/sgi_io_init.c linux-2.5.10-new/arch/ia64/sn/io/sgi_io_init.c --- linux-2.5.10-base/arch/ia64/sn/io/sgi_io_init.c Wed May 8 17:51:01 2002 +++ linux-2.5.10-new/arch/ia64/sn/io/sgi_io_init.c Wed May 8 18:00:13 2002 @@ -255,7 +255,7 @@ cnodeid_t cnode; cpuid_t cpu; - for (cpu = 0; cpu < smp_num_cpus; cpu++) { + for (cpu = 0; cpu < NR_CPUS; cpu++) { /* Skip holes in CPU space */ if (cpu_enabled(cpu)) { init_platform_pda(cpu); diff -Nur linux-2.5.10-base/arch/ia64/sn/io/sn1/ml_SN_intr.c linux-2.5.10-new/arch/ia64/sn/io/sn1/ml_SN_intr.c --- linux-2.5.10-base/arch/ia64/sn/io/sn1/ml_SN_intr.c Wed May 8 17:51:01 2002 +++ linux-2.5.10-new/arch/ia64/sn/io/sn1/ml_SN_intr.c Wed May 8 18:01:28 2002 @@ -987,12 +987,13 @@ char subnode_done[NUM_SUBNODES]; // cpu = cnodetocpu(cnode); - for (cpu = 0; cpu < smp_num_cpus; cpu++) { + for (cpu = 0; cpu < NR_CPUS; cpu++) { + if (!cpu_online(cpu)) continue; if (cpuid_to_cnodeid(cpu) == cnode) { break; } } - if (cpu == smp_num_cpus) cpu = CPU_NONE; + if (cpu == NR_CPUS) cpu = CPU_NONE; if (cpu == CPU_NONE) { printk("Node %d has no CPUs", cnode); return; @@ -1001,7 +1002,7 @@ for (i=0; i<NUM_SUBNODES; i++) subnode_done[i] = 0; - for (; cpu<smp_num_cpus && cpu_enabled(cpu) && cpuid_to_cnodeid(cpu) == cnode; cpu++) { + for (; cpu<NR_CPUS && cpu_enabled(cpu) && cpuid_to_cnodeid(cpu) == cnode; cpu++) { int which_subnode = cpuid_to_subnode(cpu); if (subnode_done[which_subnode]) continue; diff -Nur linux-2.5.10-base/arch/ia64/sn/kernel/llsc4.c linux-2.5.10-new/arch/ia64/sn/kernel/llsc4.c --- linux-2.5.10-base/arch/ia64/sn/kernel/llsc4.c Wed May 8 17:51:02 2002 +++ linux-2.5.10-new/arch/ia64/sn/kernel/llsc4.c Wed May 8 18:03:40 2002 @@ -1005,14 +1005,15 @@ printk("Testing cross interrupts\n"); - while (control_cpu != smp_num_cpus) { - if (mycpu == cpu_logical_map(control_cpu)) { - for (cpu=0; cpu<smp_num_cpus; cpu++) { - printk("Sending interrupt from %d to %d\n", mycpu, cpu_logical_map(cpu)); + while (control_cpu != NR_CPUS) { + if (mycpu == control_cpu) { + for (cpu=0; cpu<NR_CPUS; cpu++) { + if (!cpu_online(cpu)) continue; + printk("Sending interrupt from %d to %d\n", mycpu, cpu); udelay(IS_RUNNING_ON_SIMULATOR ? 10000 : 400000); - smp_send_reschedule(cpu_logical_map(cpu)); + smp_send_reschedule(cpu); udelay(IS_RUNNING_ON_SIMULATOR ? 10000 : 400000); - smp_send_reschedule(cpu_logical_map(cpu)); + smp_send_reschedule(cpu); udelay(IS_RUNNING_ON_SIMULATOR ? 10000 : 400000); } control_cpu++; @@ -1021,7 +1022,7 @@ zzzprint_resched = 1; - if (mycpu == cpu_logical_map(smp_num_cpus-1)) { + if (mycpu == NR_CPUS-1) { printk("\nTight loop of cpu %d sending ints to cpu 0 (every 100 us)\n", mycpu); udelay(IS_RUNNING_ON_SIMULATOR ? 1000 : 1000000); __cli(); diff -Nur linux-2.5.10-base/arch/ia64/sn/kernel/setup.c linux-2.5.10-new/arch/ia64/sn/kernel/setup.c --- linux-2.5.10-base/arch/ia64/sn/kernel/setup.c Wed May 8 17:51:02 2002 +++ linux-2.5.10-new/arch/ia64/sn/kernel/setup.c Wed May 8 18:05:27 2002 @@ -426,11 +426,13 @@ cnodeid_to_cpuid(int cnode) { int cpu; - for (cpu = 0; cpu < smp_num_cpus; cpu++) + for (cpu = 0; cpu < NR_CPUS; cpu++) { + if (!cpu_online(cpu)) continue; if (cpuid_to_cnodeid(cpu) == cnode) break; + } - if (cpu == smp_num_cpus) + if (cpu == NR_CPUS) cpu = -1; return cpu; diff -Nur linux-2.5.10-base/arch/ia64/sn/kernel/sn1/sn1_smp.c linux-2.5.10-new/arch/ia64/sn/kernel/sn1/sn1_smp.c --- linux-2.5.10-base/arch/ia64/sn/kernel/sn1/sn1_smp.c Wed May 8 17:51:02 2002 +++ linux-2.5.10-new/arch/ia64/sn/kernel/sn1/sn1_smp.c Wed May 8 18:06:38 2002 @@ -203,7 +203,7 @@ int backlog = 0; #endif - if (smp_num_cpus == 1) { + if (num_online_cpus() == 1) { sn1_ptc_l_range(start, end, nbits); return; } @@ -302,7 +302,7 @@ params->end = end; params->nbits = nbits; params->rid = (unsigned int) ia64_get_rr(start); - atomic_set(¶ms->unfinished_count, smp_num_cpus); + atomic_set(¶ms->unfinished_count, num_online_cpus()); /* The atomic_set above can hit memory *after* the update * to ptcParamsEmpty below, which opens a timing window @@ -425,7 +425,7 @@ { if (!ia64_ptc_domain_info) { printk("SMP: Can't find PTC domain info. Forcing UP mode\n"); - smp_num_cpus = 1; + cpu_online_map = 1; return; } diff -Nur linux-2.5.10-base/include/asm-ia64/hardirq.h linux-2.5.10-new/include/asm-ia64/hardirq.h --- linux-2.5.10-base/include/asm-ia64/hardirq.h Wed May 8 17:50:34 2002 +++ linux-2.5.10-new/include/asm-ia64/hardirq.h Wed May 8 17:58:55 2002 @@ -58,7 +58,7 @@ { int i; - for (i = 0; i < smp_num_cpus; i++) + for (i = 0; i < NR_CPUS; i++) if (irq_count(i)) return 1; return 0; diff -Nur linux-2.5.10-base/include/asm-ia64/smp.h linux-2.5.10-new/include/asm-ia64/smp.h --- linux-2.5.10-base/include/asm-ia64/smp.h Wed May 8 17:50:34 2002 +++ linux-2.5.10-new/include/asm-ia64/smp.h Wed May 8 17:58:55 2002 @@ -39,15 +39,26 @@ extern volatile unsigned long cpu_online_map; extern unsigned long ipi_base_addr; extern unsigned char smp_int_redirect; -extern int smp_num_cpus; extern volatile int ia64_cpu_to_sapicid[]; #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] -#define cpu_number_map(i) (i) -#define cpu_logical_map(i) (i) extern unsigned long ap_wakeup_vector; +#define cpu_online(cpu) (cpu_online_map & (1<<(cpu))) +extern inline unsigned int num_online_cpus(void) +{ + return hweight64(cpu_online_map); +} + +extern inline int any_online_cpu(unsigned int mask) +{ + if (mask & cpu_online_map) + return __ffs(mask & cpu_online_map); + + return -1; +} + /* * Function to map hard smp processor id to logical id. Slow, so * don't use this in performance-critical code. @@ -57,7 +68,7 @@ { int i; - for (i = 0; i < smp_num_cpus; ++i) + for (i = 0; i < NR_CPUS; ++i) if (cpu_physical_id(i) == (__u32) cpuid) break; return i; @@ -108,6 +119,11 @@ return lid.f.id << 8 | lid.f.eid; } +/* Upping and downing of CPUs */ +extern int __cpu_disable(void); +extern void __cpu_die(unsigned int cpu); +extern int __cpu_up(unsigned int cpu); + #define NO_PROC_ID 0xffffffff /* no processor magic marker */ extern void __init init_smp_config (void);
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