linux-kernel - Re: [PATCH 06/11] kexec: A new system call, kexec_file

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Message-ID: <20140226153709.GE22639@pd.tnic>
Date:	Wed, 26 Feb 2014 16:37:09 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	linux-kernel@...r.kernel.org, kexec@...ts.infradead.org,
	ebiederm@...ssion.com, hpa@...or.com, mjg59@...f.ucam.org,
	greg@...ah.com, jkosina@...e.cz
Subject: Re: [PATCH 06/11] kexec: A new system call, kexec_file_load, for in
 kernel kexec

On Mon, Feb 24, 2014 at 11:41:31AM -0500, Vivek Goyal wrote:
> Right now there is only one user. But once other image loader support
> comes along or other arches support file based kexec, they can make
> use of same function.
> 
> This is a pretty important modification as it decides what's the starting
> point of next kernel image. I wanted to make it a function callable by
> users who wanted to modify it instead of of letting them directly 
> modify image->start.

But are you expecting any other way to set image->start by the other
arches/image loaders?

> Could be. I am trying to reuse exisitng code. In current code, user space
> passes a list of segments and then kernel calls this function to make sure
> all the segments passed in make sense.
> 
> Here also arch dependent part of kernel is preparing a list of segments
> wanted and then generic code is reusing the existing function to make
> sure segment list is sane. I like code reuse part of it.

Right, ok, this was just an idea. Maybe not worth it.

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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