linux-kernel - Re: [patch 5/5] elf: Add support for loading ET

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Message-ID: <20111021112031.GO14464@moon>
Date:	Fri, 21 Oct 2011 15:20:31 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Glauber Costa <glommer@...allels.com>
Cc:	Tejun Heo <tj@...nel.org>, linux-kernel@...r.kernel.org,
	Andrew Vagin <avagin@...allels.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	James Bottomley <jbottomley@...allels.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Dave Hansen <dave@...ux.vnet.ibm.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Daniel Lezcano <dlezcano@...ibm.com>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>
Subject: Re: [patch 5/5] elf: Add support for loading ET_CKPT files

On Fri, Oct 21, 2011 at 03:06:12PM +0400, Glauber Costa wrote:
...
> exec() is a fundamental interface to the kernel, and the change
> proposed here is too disruptive. Not only that, it is rather
> unannounced: since not always one knows kind of fmt file is being
> exec'd, it gets hard to infer which behavior to expect.
> 

This missed snipped in changelog indeed my very fault, sorry for that.

> I am wondering, though: if exec is a problem, but the binary handler
> is not, maybe we can exec a process using this handler, and then
> have the handler itself to create the thread hierarchy. This way we
> avoid changing exec() behavior at all, yet achieving the same
> results.
> 
> What do you think?
> 
> 

Glauber, could you please elaborate, you mean to call for forks inside
elf-chkpt handler, right? Or you mean something else?

	Cyrill
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