linux-kernel - Re: [RFC][v8][PATCH 9/10]: Define clone3() syscall

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Message-ID: <cfd18e0f0910220326w1a71b899s5ff0fce9e0a2b8ed@mail.gmail.com>
Date:	Thu, 22 Oct 2009 12:26:48 +0200
From:	Michael Kerrisk <mtk.manpages@...glemail.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Matt Helsley <matthltc@...ibm.com>,
	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>,
	randy.dunlap@...cle.com, arnd@...db.de,
	Containers <containers@...ts.linux-foundation.org>,
	Nathan Lynch <nathanl@...tin.ibm.com>,
	linux-kernel@...r.kernel.org, Louis.Rilling@...labs.com,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	kosaki.motohiro@...fujitsu.com, mingo@...e.hu,
	linux-api@...r.kernel.org, torvalds@...ux-foundation.org,
	Alexey Dobriyan <adobriyan@...il.com>, roland@...hat.com,
	Pavel Emelyanov <xemul@...nvz.org>
Subject: Re: [RFC][v8][PATCH 9/10]: Define clone3() syscall

Peter,

On Wed, Oct 21, 2009 at 3:03 PM, H. Peter Anvin <hpa@...or.com> wrote:
> On 10/21/2009 01:26 PM, Michael Kerrisk wrote:
>>
>> My question here is: what does "3" actually mean? In general, system
>> calls have not followed any convention of numbering to indicate
>> successive versions -- clone2() being the one possible exception that
>> I know of.
>>
>
> "3" is number of arguments.

sys_clone3(struct clone_struct __user *ucs, pid_t __user *pids)

It appears to me that the number of arguments is 2.

> It's better than "extended" or something like
> that simply because "extended" just means "more than", and a number at least
> tells you *how much more than*.

I'm not sure why you think including a number in the name tells us
"how much more than". Unless you are considering the numbering to be
version numbers, which apparently is not what you mean.

Thanks,

Michael

-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface" http://blog.man7.org/
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