From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: [RFC][PATCH -mm 4/6] Freezer: Prevent new tasks from
	inheriting TIF_FREEZE set
Date: Tue, 10 Jul 2007 08:03:42 +0200
Message-ID: <200707100803.43799.rjw@sisk.pl>
References: <200707092229.08898.rjw@sisk.pl> <200707092234.55437.rjw@sisk.pl>
	<20070709232113.GG1967@elf.ucw.cz>
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To: Pavel Machek <pavel@ucw.cz>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>, Miklos Szeredi <miklos@szeredi.hu>, pm list <linux-pm@lists.linux-foundation.org>, Oleg Nesterov <oleg@tv-sign.ru>
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On Tuesday, 10 July 2007 01:21, Pavel Machek wrote:
> Hi!
> 
> > From: Rafael J. Wysocki <rjw@sisk.pl>
> > 
> > Tasks should go to the refrigerator only if explicitly requested to do that by
> > the freezer and not as a result of inheriting the TIF_FREEZE flag set from the
> > parent.  Make it happen.
> 
> Umm, what prevents userspace task from escaping freezer this way? Does
> tasklist_lock prevent new tasks and thus this race?

I think so.

Greetings,
Rafael


-- 
"Premature optimization is the root of all evil." - Donald Knuth