All of lore.kernel.org
 help / color / mirror / Atom feed
From: Oleg Nesterov <oleg@tv-sign.ru>
To: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
	LKML <linux-kernel@vger.kernel.org>,
	Andrew Morton <akpm@osdl.org>, Pavel Machek <pavel@ucw.cz>,
	Aneesh Kumar <aneesh.kumar@gmail.com>,
	"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
	Gautham R Shenoy <ego@in.ibm.com>
Subject: Re: [RFC][PATCH 1/3] Freezer: Fix vfork problem
Date: Mon, 26 Feb 2007 19:11:29 +0300	[thread overview]
Message-ID: <20070226161129.GA527@tv-sign.ru> (raw)
In-Reply-To: <20070226151442.GA29869@in.ibm.com>

On 02/26, Srivatsa Vaddagiri wrote:
>
> On Mon, Feb 26, 2007 at 03:00:43PM +0300, Oleg Nesterov wrote:
> > In that case we should also modify ____call_usermodehelper(), otherwise we have
> > the same "deadlock" if it is frozen. But this is not so easy to do as I thought
> > before.
> 
> Before ____call_usermodehelper can freeze, it should have entered userspace 
> right? By that time, its vfork parent should have definitely woken up,
> which should avoid the deadlock you point out?

Ah, yes, thanks for correcting me.

We are doing flush_old_exec() a way before entering userspace of course.

Oleg.


  reply	other threads:[~2007-02-26 16:08 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-02-26 10:39 [RFC][PATCH 0/3] More freezer patches Rafael J. Wysocki
2007-02-26 10:47 ` [RFC][PATCH 1/3] Freezer: Fix vfork problem Rafael J. Wysocki
2007-02-26 12:00   ` Oleg Nesterov
2007-02-26 15:14     ` Srivatsa Vaddagiri
2007-02-26 16:11       ` Oleg Nesterov [this message]
2007-02-26 18:28         ` Rafael J. Wysocki
2007-02-26 21:25           ` Oleg Nesterov
2007-02-27  0:31             ` Rafael J. Wysocki
2007-02-27  4:33               ` Aneesh Kumar
2007-02-27  4:42                 ` Srivatsa Vaddagiri
2007-02-27  8:37                 ` Oleg Nesterov
2007-02-27 21:21                   ` Rafael J. Wysocki
2007-02-27 21:53                     ` Oleg Nesterov
2007-02-28  1:23                       ` Srivatsa Vaddagiri
2007-02-28 10:57                         ` Rafael J. Wysocki
2007-02-28 11:00                           ` Oleg Nesterov
2007-02-28 19:36                             ` Rafael J. Wysocki
2007-02-28 20:30                               ` Oleg Nesterov
2007-02-28 22:34                                 ` Rafael J. Wysocki
2007-02-28 11:01                           ` Srivatsa Vaddagiri
2007-02-26 10:49 ` [RFC][PATCH 2/3] Freezer: Take kernel_execve into consideration Rafael J. Wysocki
2007-02-26 12:45   ` Pavel Machek
2007-02-26 10:52 ` [RFC][PATCH 3/3] Freezer: Prevent ___call_usermodehelper from missing freezing requests Rafael J. Wysocki
2007-02-26 11:52   ` Oleg Nesterov
2007-02-26 11:58   ` Aneesh Kumar
2007-02-26 18:30     ` Rafael J. Wysocki

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:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

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

  git send-email \
    --in-reply-to=20070226161129.GA527@tv-sign.ru \
    --to=oleg@tv-sign.ru \
    --cc=akpm@osdl.org \
    --cc=aneesh.kumar@gmail.com \
    --cc=ego@in.ibm.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=paulmck@linux.vnet.ibm.com \
    --cc=pavel@ucw.cz \
    --cc=rjw@sisk.pl \
    --cc=vatsa@in.ibm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.