LKML Archive on
 help / color / Atom feed
From: "Ahmed S. Darwish" <>
Subject: Re: [PATCH 2.6.21-rc4] kernel/exit: Fix a comment and code contradiction
Date: Sat, 17 Mar 2007 17:00:21 +0200
Message-ID: <20070317150021.GA3618@Ahmed> (raw)
In-Reply-To: <20070317093856.GB32496@leiferikson>

[Johannes please use replay-to-all to notify all readers]

On 2007-03-17 9:45:36 Johannes Weiner wrote:
> On Sat, Mar 17, 2007 at 08:21:32AM +0200, Ahmed S. Darwish wrote:
> > Comment in release_task() claims that group leader's parent process 
> > is signalled only if it desires so, which is not true.
> AFAIS, `if it wants notification' means, it does not ignore its children
> via SIG_IGN als handler for SIGCHLD.

AFAIK, exit_signal = -1 means that the parent don't want to be signalled,
like what happenes when using CLONE_THREAD. 

But it's even signalled in that case (after issuing a BUG):
   BUG_ON(leader->exit_signal == -1);
   do_notify_parent(leader, leader->exit_signal);

> do_notify_parent() checks if the parent wants to get informed about the
> child states.

Yes it does the check but it notifies the given task_struct anyway:

	BUG_ON(sig == -1);
	[ Continue parent notification normally ]
Ahmed S. Darwish

      reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-03-17  6:21 Ahmed S. Darwish
2007-03-17  9:45 ` Johannes Weiner
2007-03-17 15:00   ` Ahmed S. Darwish [this message]

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20070317150021.GA3618@Ahmed \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

LKML Archive on

Archives are clonable:
	git clone --mirror lkml/git/0.git
	git clone --mirror lkml/git/1.git
	git clone --mirror lkml/git/2.git
	git clone --mirror lkml/git/3.git
	git clone --mirror lkml/git/4.git
	git clone --mirror lkml/git/5.git
	git clone --mirror lkml/git/6.git
	git clone --mirror lkml/git/7.git
	git clone --mirror lkml/git/8.git
	git clone --mirror lkml/git/9.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ \
	public-inbox-index lkml

Example config snippet for mirrors

Newsgroup available over NNTP:

AGPL code for this site: git clone