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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-12 11:34:10 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-12 11:34:10 -0800 |
| commit | 702a7c7609bec3a940b6a46b0d6ab9ce45274580 (patch) | |
| tree | 6c169691449259410b9b51a146acb0e837dae96a /kernel/cpu.c | |
| parent | 053fe57ac249a9531c396175778160d9e9509399 (diff) | |
| parent | b9889ed1ddeca5a3f3569c8de7354e9e97d803ae (diff) | |
| download | linux-702a7c7609bec3a940b6a46b0d6ab9ce45274580.tar.gz linux-702a7c7609bec3a940b6a46b0d6ab9ce45274580.tar.bz2 linux-702a7c7609bec3a940b6a46b0d6ab9ce45274580.zip | |
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (21 commits)
sched: Remove forced2_migrations stats
sched: Fix memory leak in two error corner cases
sched: Fix build warning in get_update_sysctl_factor()
sched: Update normalized values on user updates via proc
sched: Make tunable scaling style configurable
sched: Fix missing sched tunable recalculation on cpu add/remove
sched: Fix task priority bug
sched: cgroup: Implement different treatment for idle shares
sched: Remove unnecessary RCU exclusion
sched: Discard some old bits
sched: Clean up check_preempt_wakeup()
sched: Move update_curr() in check_preempt_wakeup() to avoid redundant call
sched: Sanitize fork() handling
sched: Clean up ttwu() rq locking
sched: Remove rq->clock coupling from set_task_cpu()
sched: Consolidate select_task_rq() callers
sched: Remove sysctl.sched_features
sched: Protect sched_rr_get_param() access to task->sched_class
sched: Protect task->cpus_allowed access in sched_getaffinity()
sched: Fix balance vs hotplug race
...
Fixed up conflicts in kernel/sysctl.c (due to sysctl cleanup)
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) |