From: Yan, Zheng Date: Fri, 15 Jun 2012 06:31:32 +0000 (+0800) Subject: perf: Allow the PMU driver to choose the CPU on which to install events X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e2d37cd213dcc0aeb3db4b37b9bd1710fe36fbf7;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git perf: Allow the PMU driver to choose the CPU on which to install events Allow the pmu->event_init callback to change event->cpu, so the PMU driver can choose the CPU on which to install events. Signed-off-by: Zheng Yan Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/r/1339741902-8449-4-git-send-email-zheng.z.yan@intel.com Signed-off-by: Ingo Molnar --- diff --git a/kernel/events/core.c b/kernel/events/core.c index 31d182e01549..fa36a39e8bb7 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -6306,7 +6306,7 @@ SYSCALL_DEFINE5(perf_event_open, /* * Get the target context (task or percpu): */ - ctx = find_get_context(pmu, task, cpu); + ctx = find_get_context(pmu, task, event->cpu); if (IS_ERR(ctx)) { err = PTR_ERR(ctx); goto err_alloc; @@ -6379,16 +6379,16 @@ SYSCALL_DEFINE5(perf_event_open, mutex_lock(&ctx->mutex); if (move_group) { - perf_install_in_context(ctx, group_leader, cpu); + perf_install_in_context(ctx, group_leader, event->cpu); get_ctx(ctx); list_for_each_entry(sibling, &group_leader->sibling_list, group_entry) { - perf_install_in_context(ctx, sibling, cpu); + perf_install_in_context(ctx, sibling, event->cpu); get_ctx(ctx); } } - perf_install_in_context(ctx, event, cpu); + perf_install_in_context(ctx, event, event->cpu); ++ctx->generation; perf_unpin_context(ctx); mutex_unlock(&ctx->mutex);