Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=49d3bd7e2b990e717aa66e229410b8f5096c4956 Commit: 49d3bd7e2b990e717aa66e229410b8f5096c4956 Parent: 83d87d167367ae2cc2c6810399aefac33a2ced41 Author: Laurent Vivier <[EMAIL PROTECTED]> AuthorDate: Mon Oct 22 16:33:07 2007 +0200 Committer: Avi Kivity <[EMAIL PROTECTED]> CommitDate: Mon Oct 22 17:21:54 2007 +0200
KVM: Use new smp_call_function_mask() in kvm_flush_remote_tlbs() In kvm_flush_remote_tlbs(), replace a loop using smp_call_function_single() by a single call to smp_call_function_mask() (which is new for x86_64). Signed-off-by: Laurent Vivier <[EMAIL PROTECTED]> Signed-off-by: Avi Kivity <[EMAIL PROTECTED]> --- drivers/kvm/kvm_main.c | 26 +++----------------------- 1 files changed, 3 insertions(+), 23 deletions(-) diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 8c458f2..07ae280 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -198,21 +198,15 @@ static void vcpu_put(struct kvm_vcpu *vcpu) static void ack_flush(void *_completed) { - atomic_t *completed = _completed; - - atomic_inc(completed); } void kvm_flush_remote_tlbs(struct kvm *kvm) { - int i, cpu, needed; + int i, cpu; cpumask_t cpus; struct kvm_vcpu *vcpu; - atomic_t completed; - atomic_set(&completed, 0); cpus_clear(cpus); - needed = 0; for (i = 0; i < KVM_MAX_VCPUS; ++i) { vcpu = kvm->vcpus[i]; if (!vcpu) @@ -221,23 +215,9 @@ void kvm_flush_remote_tlbs(struct kvm *kvm) continue; cpu = vcpu->cpu; if (cpu != -1 && cpu != raw_smp_processor_id()) - if (!cpu_isset(cpu, cpus)) { - cpu_set(cpu, cpus); - ++needed; - } - } - - /* - * We really want smp_call_function_mask() here. But that's not - * available, so ipi all cpus in parallel and wait for them - * to complete. - */ - for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus)) - smp_call_function_single(cpu, ack_flush, &completed, 1, 0); - while (atomic_read(&completed) != needed) { - cpu_relax(); - barrier(); + cpu_set(cpu, cpus); } + smp_call_function_mask(cpus, ack_flush, NULL, 1); } int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html