Unverified Commit db863d19 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!10966 perf: Optimize perf_pmu_migrate_context() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Chuang <liuchuang40@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/THOGANKLW4ED4OCMCOLCFAUCSHV5TFW4/ 
 
https://gitee.com/openeuler/kernel/issues/IAL27E 
 
Link:https://gitee.com/openeuler/kernel/pulls/10966

 

Reviewed-by: default avatarYe Weihua <yeweihua4@huawei.com>
Reviewed-by: default avatarLiu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
parents 5f1e8ffb c6653cb6

kernel/events/core.c

+35 −33
Original line number Diff line number Diff line
@@ -11247,6 +11247,7 @@ void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu) 
		list_add(&event->migrate_entry, &events);

	}



	if (!list_empty(&events)) {

		/*

		 * Wait for the events to quiesce before re-instating them.

		 */
@@ -11284,6 +11285,7 @@ void perf_pmu_migrate_context(struct pmu *pmu, int src_cpu, int dst_cpu) 
			perf_install_in_context(dst_ctx, event, dst_cpu);

			get_ctx(dst_ctx);

		}

	}

	mutex_unlock(&dst_ctx->mutex);

	mutex_unlock(&src_ctx->mutex);

}