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| author |   Ingo Molnar <mingo@elte.hu> | 2009-12-14 09:16:49 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-12-14 09:16:49 +0100 |
| commit | cc0104e877fff32865a67b256d3a9ce52ff15790 (patch) | |
| tree | 18779442274e81607822ecb0905c55ac4ce6a163 /kernel/cpu.c | |
| parent | ksym_tracer: Fix bad cast (diff) | |
| parent | Merge branch 'ixp4xx' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6 (diff) | |
| download | linux-dev-cc0104e877fff32865a67b256d3a9ce52ff15790.tar.xz linux-dev-cc0104e877fff32865a67b256d3a9ce52ff15790.zip | |
Merge branch 'linus' into tracing/urgent
Conflicts:
kernel/trace/trace_kprobe.c
Merge reason: resolve the conflict.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/cpu.c')
| -rw-r--r-- | kernel/cpu.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 7c4e2713df0a..291ac586f37f 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -212,6 +212,8 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod, hcpu, -1, &nr_calls); if (err == NOTIFY_BAD) { + set_cpu_active(cpu, true); + nr_calls--; __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod, hcpu, nr_calls, NULL); @@ -223,11 +225,11 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen) /* Ensure that we are not runnable on dying cpu */ cpumask_copy(old_allowed, ¤t->cpus_allowed); - set_cpus_allowed_ptr(current, - cpumask_of(cpumask_any_but(cpu_online_mask, cpu))); + set_cpus_allowed_ptr(current, cpu_active_mask); err = __stop_machine(take_cpu_down, &tcd_param, cpumask_of(cpu)); if (err) { + set_cpu_active(cpu, true); /* CPU didn't die: tell everyone. Can't complain. */ if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod, hcpu) == NOTIFY_BAD) @@ -292,9 +294,6 @@ int __ref cpu_down(unsigned int cpu) err = _cpu_down(cpu, 0); - if (cpu_online(cpu)) - set_cpu_active(cpu, true); - out: cpu_maps_update_done(); stop_machine_destroy(); @@ -387,6 +386,15 @@ int disable_nonboot_cpus(void) * with the userspace trying to use the CPU hotplug at the same time */ cpumask_clear(frozen_cpus); + + for_each_online_cpu(cpu) { + if (cpu == first_cpu) + continue; + set_cpu_active(cpu, false); + } + + synchronize_sched(); + printk("Disabling non-boot CPUs ...\n"); for_each_online_cpu(cpu) { if (cpu == first_cpu) |