Re: [PATCH] tracing: Fix race when concurrently splice_read trace_pipe
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2023-08-11 19:25:32
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On Thu, 10 Aug 2023 20:39:05 +0800 Zheng Yejian [off-list ref] wrote:
When concurrently splice_read file trace_pipe and per_cpu/cpu*/trace_pipe, there are more data being read out than expected.
Honestly the real fix is to prevent that use case. We should probably have access to trace_pipe lock all the per_cpu trace_pipes too. -- Steve