linux-kernel - [PATCH V5 03/13] perf: Allow pmu to choose cpu on which to install event

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Date:	Tue, 12 Jun 2012 13:37:38 +0800
From:	"Yan, Zheng" <zheng.z.yan@...el.com>
To:	a.p.zijlstra@...llo.nl, mingo@...e.hu, jolsa@...hat.com,
	eranian@...gle.com, andi@...stfloor.org,
	linux-kernel@...r.kernel.org
Cc:	"Yan, Zheng" <zheng.z.yan@...el.com>
Subject: [PATCH V5 03/13] perf: Allow pmu to choose cpu on which to install event

From: "Yan, Zheng" <zheng.z.yan@...el.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@...el.com>
---
 kernel/events/core.c |    8 ++++----
 1 file 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);
-- 
1.7.10.2

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