linux-kernel - Re: [PATCH v3 1/1] ftrace, workqueuetrace: Make workqueuetracepoints use TRACE

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Date:	Tue, 21 Apr 2009 17:50:32 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Zhaolei <zhaolei@...fujitsu.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Tom Zanussi <tzanussi@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] ftrace, workqueuetrace: Make
	workqueuetracepoints use TRACE_EVENT macro

On 04/21, Oleg Nesterov wrote:
>
> On 04/21, Frederic Weisbecker wrote:
> >
> > For example,
> >
> > - the user opens the stat file
> > - then the entries are loaded and sorted into memory
> > - one of the workqueues is destroyed

Hmm. And what protects cws when, say, workqueue_stat_show() is called?
Can't we race with probe_workqueue_destruction()->kfree() ?

Oleg.

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