linux-kernel - Re: [PATCH 1/2] Extend sys_clone and sys

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Message-ID: <478E1D3A.1060904@openvz.org>
Date:	Wed, 16 Jan 2008 18:05:30 +0300
From:	Pavel Emelyanov <xemul@...nvz.org>
To:	Jonathan Corbet <corbet@....net>
CC:	Linux Containers <containers@...ts.osdl.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Cedric Le Goater <clg@...ibm.com>, drepper@...hat.com,
	Serge Hallyn <serue@...ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 1/2] Extend sys_clone and sys_unshare system calls API

Jonathan Corbet wrote:
> Hi, Pavel,
> 
> [Adding Ulrich]
> 
>> I use the last bit in the clone_flags for CLONE_LONGARG. When set it
>> will denote that the child_tidptr is not a pointer to a tid storage,
>> but the pointer to the struct long_clone_struct which currently 
>> looks like this:
> 
> I'm probably just totally off the deep end, but something did occur to
> me: this looks an awful lot like a special version of the sys_indirect()
> idea.  Unless it has been somehow decided that sys_indirect() is the
> wrong idea, might it not be better to look at making that interface
> solve the extended clone() problem as well?

We has such an idea, but as far as I know sys_indirect idea is
not yet accomplished. So I risked to propose such an extension
for sys_clone.

If Andrew says that sys_indirect is on its way to -mm tree, then
we'll surely wait and use this one for namespaces.

> jon
> 

Thanks,
Pavel
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