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Date: Sun, 27 Jul 2008 11:03:10 +0200
From: Roman Divacky <rdivacky@FreeBSD.org>
To: Alexander Leidinger <Alexander@Leidinger.net>
Message-ID: <20080727090309.GA63345@freebsd.org>
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Cc: freebsd-emulation@FreeBSD.org, "Sean C. Farley" <scf@FreeBSD.org>,
	Chagin Dmitry <chagin.dmitry@gmail.com>
Subject: Re: kern/122318 (CMake core dumping, chroot exiting)
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On Sat, Jul 26, 2008 at 08:31:10AM +0200, Alexander Leidinger wrote:
> Quoting "Sean C. Farley" <scf@FreeBSD.org> (Fri, 25 Jul 2008 15:36:52
> -0500 (CDT)):
> 
> > On Fri, 25 Jul 2008, Chagin Dmitry wrote:
> 
> > > uname must work on all supported linuxulators
> > 
> > I agree, and it does work until I start playing with the Linux version.
> 
> Don't play with the linux version while linux programs are running.
> Changing the version from 2.4.x to 2.6.x and vice versa while a program
> is running is not supported at all and known to cause havoc. Roman, do
> we have the possibility to make an easy check in the sysctl handler if
> a linux program is still running and return an error from the handler?
> Did I forgot something which makes it impossible to switch when a
> program was run under 2.6 and stopped?

I'll submit a patch that makes it impossible to switch the veresion when
programs are running... it's not hard (elf{32}_brand_inuse() for every
elf brand the linuxulator registered)