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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.
next prev parent 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
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