Message-ID: <4AC255A4.4030002@zytor.com>
Date: Tue, 29 Sep 2009 11:44:52 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Roland McGrath <roland@redhat.com>
CC: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
       Arnd Bergmann <arnd@arndb.de>,
       Containers <containers@lists.linux-foundation.org>,
       Nathan Lynch <nathanl@austin.ibm.com>, linux-kernel@vger.kernel.org,
       "Eric W. Biederman" <ebiederm@xmission.com>, mingo@elte.hu,
       torvalds@linux-foundation.org, Alexey Dobriyan <adobriyan@gmail.com>,
       Pavel Emelyanov <xemul@openvz.org>, linux-api@vger.kernel.org,
       kosaki.motohiro@jp.fujitsu.com
Subject: Re: [RFC][v7][PATCH 8/9]: Define clone2() syscall
References: <20090924165548.GA16586@us.ibm.com>	<20090924170308.GH16989@us.ibm.com>	<200909242343.59903.arnd@arndb.de>	<20090925082346.GB4436@localdomain>	<20090925105632.GG12824@hawkmoon.kerlabs.com>	<20090929180537.GD4625@us.ibm.com> <20090929184023.532DF34@magilla.sf.frob.com>
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On 09/29/2009 11:40 AM, Roland McGrath wrote:
> Why add a new syscall at all instead of just using a new CLONE_* flag to
> indicate that the argument layout is different?

What an absolutely atrociously bad idea.

We already have a syscall layer which is painful to thunk in places, and
this would make it much worse.

	-hpa

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