From: Lai Jiangshan <laijs@cn.fujitsu.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [QUESTION] trace_function_graph: consumed event may be invalid
Date: Tue, 30 Jun 2009 16:14:36 +0800 [thread overview]
Message-ID: <4A49C96C.6070305@cn.fujitsu.com> (raw)
In get_return_for_leaf() {
......
ring_buffer_consume()
......
access to @curr->ent.pid
}
@curr is saved at consumed event, if this event is the last event
in the page, the ring_buffer may reuse the page. It will become invalid.
Is there any other code to ensure it valid when we `cat trace_pipe`?
Lai.
next reply other threads:[~2009-06-30 8:13 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-30 8:14 Lai Jiangshan [this message]
2009-06-30 10:54 ` [QUESTION] trace_function_graph: consumed event may be invalid Frederic Weisbecker
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