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Subject[PATCH V6 03/13] perf: Allow pmu to choose cpu on which to install event
Date
From: "Yan, Zheng" <zheng.z.yan@intel.com>

Allow the pmu->event_init callback to change event->cpu, so pmu can
choose cpu on which to install event.

Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
---
kernel/events/core.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/events/core.c b/kernel/events/core.c
index d71a2d6..2c05027 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -6302,7 +6302,7 @@ 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;
@@ -6375,16 +6375,16 @@ 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);
--
1.7.6.5


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