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From: Thiago Macieira <thiago.macieira@intel.com>
To: Oleg Nesterov <oleg@redhat.com>
Cc: josh@joshtriplett.org, Al Viro <viro@zeniv.linux.org.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	Andy Lutomirski <luto@amacapital.net>,
	Ingo Molnar <mingo@redhat.com>, Kees Cook <keescook@chromium.org>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	"H. Peter Anvin" <hpa@zytor.com>, Rik van Riel <riel@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Michael Kerrisk <mtk.manpages@gmail.com>,
	linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
	linux-fsdevel@vger.kernel.org, x86@kernel.org
Subject: Re: [PATCH 6/6] clone4: Introduce new CLONE_FD flag to get task exit notification via fd
Date: Sat, 14 Mar 2015 11:38:29 -0700	[thread overview]
Message-ID: <28025621.k7WkrfHd4d@tjmaciei-mobl4> (raw)
In-Reply-To: <20150314143235.GA12086@redhat.com>

On Saturday 14 March 2015 15:32:35 Oleg Nesterov wrote:
> It is not clear to me what do_wait() should do with ->autoreap child, even
> ignoring ptrace.
> 
> Just suppose that real_parent has a single "autoreap" child. Should
> wait(NULL) hanf then?

It should ignore the child that is set to autoreap. wait(NULL) should return -
ECHILD, indicating there are no children waiting to be reaped.

But now I realise that this might have implications for session management and 
job control.

> If yes, who will wake the parent up?
> 
> If no, I do not see the necessary changes in wait_cosnider_task().

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center


  reply	other threads:[~2015-03-14 18:38 UTC|newest]

Thread overview: 83+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-13  1:40 [PATCH 0/6] CLONE_FD: Task exit notification via file descriptor Josh Triplett
2015-03-13  1:40 ` Josh Triplett
2015-03-13  1:40 ` [PATCH 1/6] clone: Support passing tls argument via C rather than pt_regs magic Josh Triplett
2015-03-13  1:40 ` [PATCH 2/6] x86: Opt into HAVE_COPY_THREAD_TLS, for both 32-bit and 64-bit Josh Triplett
2015-03-13  1:40   ` Josh Triplett
2015-03-13 22:01   ` Andy Lutomirski
2015-03-13 22:01     ` Andy Lutomirski
2015-03-13 22:31     ` josh
2015-03-13 22:38       ` Andy Lutomirski
2015-03-13 22:43         ` josh
2015-03-13 22:43           ` josh-iaAMLnmF4UmaiuxdJuQwMA
2015-03-13 22:45           ` Andy Lutomirski
2015-03-13 22:45             ` Andy Lutomirski
2015-03-13 23:01             ` josh
2015-03-13 23:01               ` josh-iaAMLnmF4UmaiuxdJuQwMA
2015-03-13  1:40 ` [PATCH 3/6] Introduce a new clone4 syscall with more flag bits and extensible arguments Josh Triplett
2015-03-13  1:40 ` [PATCH 4/6] signal: Factor out a helper function to process task_struct exit_code Josh Triplett
2015-03-13  1:40 ` [PATCH 5/6] fs: Make alloc_fd non-private Josh Triplett
2015-03-13  1:40   ` Josh Triplett
2015-03-13  1:41 ` [PATCH 6/6] clone4: Introduce new CLONE_FD flag to get task exit notification via fd Josh Triplett
2015-03-13 16:21   ` Oleg Nesterov
2015-03-13 19:57     ` josh
2015-03-13 21:34       ` Andy Lutomirski
2015-03-13 21:34         ` Andy Lutomirski
2015-03-13 22:20         ` josh
2015-03-13 22:28           ` Andy Lutomirski
2015-03-13 22:28             ` Andy Lutomirski
2015-03-13 22:34             ` josh
2015-03-13 22:34               ` josh-iaAMLnmF4UmaiuxdJuQwMA
2015-03-13 22:38               ` Andy Lutomirski
2015-03-14 14:14       ` Oleg Nesterov
2015-03-14 14:14         ` Oleg Nesterov
2015-03-14 14:32         ` Oleg Nesterov
2015-03-14 14:32           ` Oleg Nesterov
2015-03-14 18:38           ` Thiago Macieira [this message]
2015-03-14 18:54             ` Oleg Nesterov
2015-03-14 22:03               ` Josh Triplett
2015-03-14 22:03                 ` Josh Triplett
2015-03-14 22:26                 ` Thiago Macieira
2015-03-14 19:01             ` Josh Triplett
2015-03-14 19:18               ` Oleg Nesterov
2015-03-14 19:18                 ` Oleg Nesterov
2015-03-14 19:47                 ` Oleg Nesterov
2015-03-14 19:47                   ` Oleg Nesterov
2015-03-14 20:14                   ` Josh Triplett
2015-03-14 20:14                     ` Josh Triplett
2015-03-14 20:30                     ` Oleg Nesterov
2015-03-14 22:14                       ` Josh Triplett
2015-03-14 22:14                         ` Josh Triplett
2015-03-14 20:03                 ` Josh Triplett
2015-03-14 20:03                   ` Josh Triplett
2015-03-14 20:20                   ` Oleg Nesterov
2015-03-14 22:09         ` Josh Triplett
2015-03-14 14:35   ` Oleg Nesterov
2015-03-14 14:35     ` Oleg Nesterov
2015-03-14 19:15     ` Josh Triplett
2015-03-14 19:15       ` Josh Triplett
2015-03-14 19:24       ` Oleg Nesterov
2015-03-14 19:48         ` Josh Triplett
2015-03-14 19:48           ` Josh Triplett
2015-03-13  1:41 ` [PATCH] clone4.2: New manpage documenting clone4(2) Josh Triplett
2015-03-13  2:07 ` [PATCH 0/6] CLONE_FD: Task exit notification via file descriptor Thiago Macieira
2015-03-13  2:07   ` Thiago Macieira
2015-03-13 16:05 ` David Drysdale
2015-03-13 16:05   ` David Drysdale
2015-03-13 19:42   ` Josh Triplett
2015-03-13 21:16     ` Thiago Macieira
2015-03-13 21:44       ` josh
2015-03-13 21:33     ` Andy Lutomirski
2015-03-13 21:45       ` josh
2015-03-13 21:45         ` josh-iaAMLnmF4UmaiuxdJuQwMA
2015-03-13 21:51         ` Andy Lutomirski
2015-03-13 21:51           ` Andy Lutomirski
2015-03-14  1:11           ` Thiago Macieira
2015-03-14  1:11             ` Thiago Macieira
2015-03-14 19:03             ` Thiago Macieira
2015-03-14 19:29               ` Josh Triplett
2015-03-14 19:29                 ` Josh Triplett
2015-03-15 10:18                 ` David Drysdale
2015-03-15 10:18                   ` David Drysdale
2015-03-15 10:59                   ` Josh Triplett
2015-03-15  8:55     ` David Drysdale
2015-03-15  8:55       ` David Drysdale

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