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From: Oleg Nesterov <oleg@tv-sign.ru>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: vatsa@in.ibm.com, Aneesh Kumar <aneesh.kumar@gmail.com>,
LKML <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>, Pavel Machek <pavel@ucw.cz>,
"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: Wed, 28 Feb 2007 14:00:48 +0300 [thread overview]
Message-ID: <20070228110048.GA263@tv-sign.ru> (raw)
In-Reply-To: <200702281157.28381.rjw@sisk.pl>
On 02/28, Rafael J. Wysocki wrote:
>
> On Wednesday, 28 February 2007 02:23, Srivatsa Vaddagiri wrote:
> > On Wed, Feb 28, 2007 at 12:53:14AM +0300, Oleg Nesterov wrote:
> > > I think it is good. Srivatsa?
> >
> > Maybe additional comments on why we don't skip vfork kernel tasks may be good.
>
> Which is because we don't want the kernel threads to be frozen in unexpected
> places, so we allow them to block freeze_processes() instead or to set
> PF_NOFREEZE?
... and because in fact it won't block freeze_processes(), ____call_usermodehelper
(the child) does a minimum before exec/exit, and it can't be frozen until it wakes
up the parent.
Oleg.
next prev parent reply other threads:[~2007-02-28 11:01 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
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 [this message]
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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