Re: Fwd: [PATCH] kretprobe instance recycled by parent process

[Zhou Yingchao <yingchao.zhou@gmail.com>]

> >> When kretprobe probe schedule() function, if probed process exit then
> >> schedule() function will never return, so some kretprobe instance will
> >> never be recycled. By this patch the parent process will recycle
> >> retprobe instance of probed function, there will be no memory leak of
> >> kretprobe instance. This patch is based on 2.6.16-rc3.
> >
> > Is there any process which can exit without go through the do_exit() path?
> > --
> When process exits through do_exit() function, it will call schedule()
> function. But if schedule() function is probed by kretprobe, this time
> schedule() function will not return never because process has exited.
>
> bibo,mao
>

In the original path, doesn't the call path of
do_exit()->exit_thread()->kprobe_flush_task(current) recycle the
kretprobe instance? Is there anything misundstood?
--
Yingchao Zhou
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 Institute Of Computing Technology
 Chinese Academy of Sciences
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