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From: Roland McGrath <roland@redhat.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>,
	Ingo Molnar <mingo@elte.hu>,
	linux-kernel@vger.kernel.org
Subject: Re: ptrace && task->exit_code
Date: Wed, 27 May 2009 16:21:41 -0700 (PDT)	[thread overview]
Message-ID: <20090527232141.8B24DFC2BD@magilla.sf.frob.com> (raw)
In-Reply-To: Oleg Nesterov's message of  Thursday, 28 May 2009 01:05:23 +0200 <20090527230523.GA10032@redhat.com>

> I didn't realize this until yesterday, but perhaps it makes sense
> to decouple ptrace && task_struct->exit_code?

I've long thought this was an attractive idea.  But it seems to have lots
of complications at least as long as ptrace-wait shares so much code with
normal wait.  I'd figured this might be one of the last things we clean up
after ptrace is disentangled from core data structures in most every other
way.

> This is not completely trivial, needs another short series.

I suspect it is more hassle than benefit to do this now.
I don't think it is the right priority.

> And. I spent a lot of time, but I can't see how to solve the problems
> with TASK_STOPPED tasks if we do this change.

I bet the complications of this all will be substantially different after
we change the ptrace locking.  So let's not worry about it yet.


Thanks,
Roland

  reply	other threads:[~2009-05-27 23:22 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-25  0:00 [RFC PATCH 7/X] ptrace: mv task->parent ptrace_task->pt_tracer Oleg Nesterov
2009-05-25 21:59 ` Oleg Nesterov
2009-05-25 22:39   ` [RFC PATCH 8/X] ptrace: introduce ptrace_tracer() helper Oleg Nesterov
2009-05-27  2:45     ` Roland McGrath
2009-05-27 21:45       ` Oleg Nesterov
2009-05-27 22:24         ` Roland McGrath
2009-05-27  2:11   ` [RFC PATCH 7/X] ptrace: mv task->parent ptrace_task->pt_tracer Roland McGrath
2009-05-27 22:41     ` Oleg Nesterov
2009-05-27 23:05       ` ptrace && task->exit_code Oleg Nesterov
2009-05-27 23:21         ` Roland McGrath [this message]
2009-05-29 19:06           ` Oleg Nesterov
2009-06-01  2:16             ` Roland McGrath
2009-05-27 23:07       ` [RFC PATCH 7/X] ptrace: mv task->parent ptrace_task->pt_tracer Roland McGrath
2009-05-27 23:59         ` Oleg Nesterov
2009-05-28  0:32           ` Roland McGrath
2009-05-28  2:54             ` Oleg Nesterov
2009-05-28  3:19               ` Roland McGrath
2009-05-28  3:35                 ` Oleg Nesterov
2009-05-28 19:28                   ` Roland McGrath

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