Unverified Commit 4a26557b authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!1902 tracing: Fix cpu buffers unavailable due to 'record_disabled' missed 

Merge Pull Request from: @ci-robot 
 
PR sync from: Zheng Yejian <zhengyejian1@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/ID7AAIWVOPVWOELB7RAQUCO2OWIOKQPI/ 
 
https://gitee.com/openeuler/kernel/issues/I7SHZP 
 
Link:https://gitee.com/openeuler/kernel/pulls/1902

 

Reviewed-by: default avatarXu Kuohai <xukuohai@huawei.com>
Signed-off-by: default avatarLiu YongQiang <liuyongqiang13@huawei.com>
parents 2a2e7e9c 355ff119

kernel/trace/trace.c

+6 −0
Original line number Diff line number Diff line
@@ -4249,11 +4249,17 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf, 
				!cpumask_test_cpu(cpu, tracing_cpumask_new)) {

			atomic_inc(&per_cpu_ptr(tr->trace_buffer.data, cpu)->disabled);

			ring_buffer_record_disable_cpu(tr->trace_buffer.buffer, cpu);

#ifdef CONFIG_TRACER_MAX_TRACE

			ring_buffer_record_disable_cpu(tr->max_buffer.buffer, cpu);

#endif

		}

		if (!cpumask_test_cpu(cpu, tr->tracing_cpumask) &&

				cpumask_test_cpu(cpu, tracing_cpumask_new)) {

			atomic_dec(&per_cpu_ptr(tr->trace_buffer.data, cpu)->disabled);

			ring_buffer_record_enable_cpu(tr->trace_buffer.buffer, cpu);

#ifdef CONFIG_TRACER_MAX_TRACE

			ring_buffer_record_enable_cpu(tr->max_buffer.buffer, cpu);

#endif

		}

	}

	arch_spin_unlock(&tr->max_lock);