Messages in this thread | | | Date | Tue, 3 Feb 2009 22:51:23 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] ftrace: do_each_pid_task() needs rcu lock |
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* Oleg Nesterov <oleg@redhat.com> wrote:
> "ftrace: use struct pid" commit 978f3a45d9499c7a447ca7615455cefb63d44165 > converted ftrace_pid_trace to "struct pid*". But we can't use > do_each_pid_task() without rcu_read_lock() even if we know the pid > itself can't go away (it was pinned in ftrace_pid_write). The exiting > task can detach itself from this pid at any moment. > > Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Applied to tip/tracing/urgent (for v2.6.29), thanks Oleg!
Ingo
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