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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: [RFC PATCH 7/X] ptrace: mv task->parent ptrace_task->pt_tracer
Date: Wed, 27 May 2009 17:32:56 -0700 (PDT)	[thread overview]
Message-ID: <20090528003256.86E4EFC2BD@magilla.sf.frob.com> (raw)
In-Reply-To: Oleg Nesterov's message of  Thursday, 28 May 2009 01:59:36 +0200 <20090527235936.GB12216@redhat.com>

> This is optimization. If exit_code == 0 we do not need to fixup
> ->last_siginfo. Note that we have another "child->exit_code = exit_code"
> below in the slow path.

Ok, I see.

> > It can check for !child->last_siginfo before lock_task_sighand().
> 
> ptrace_stop() always sets ->last_siginfo != NULL.

Oh, right.  It's only job control stops where it's NULL.

> OK, lets do this change later ;)

Agreed.


Thanks,
Roland

  reply	other threads:[~2009-05-28  0:33 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-25  0:00 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
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 [this message]
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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