linux-kernel - Re: [PATCH v2 14/16] x86, nvdimm, kexec: Use walk_iomem_res

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Message-ID: <20151227102406.GB19398@nazgul.tnic>
Date:	Sun, 27 Dec 2015 11:24:06 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	Minfei Huang <mhuang@...hat.com>, Toshi Kani <toshi.kani@....com>
Cc:	linux-arch@...r.kernel.org, linux-nvdimm@...1.01.org,
	x86@...nel.org, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	akpm@...ux-foundation.org, Dave Young <dyoung@...hat.com>,
	Dan Williams <dan.j.williams@...el.com>
Subject: Re: [PATCH v2 14/16] x86, nvdimm, kexec: Use walk_iomem_res_desc()
 for iomem search

On Sun, Dec 27, 2015 at 10:12:57AM +0800, Minfei Huang wrote:
> You can refer the below link that you may get a clue about GART. This is
> the fisrt time kexec-tools tried to support to ignore GART region in 2nd
> kernel.
> 
> http://lists.infradead.org/pipermail/kexec/2008-December/003096.html

So theoretically we could export that IORES_DESC* enum in an uapi header and
move kexec-tools to use that.

However, I'm fuzzy on how exactly the whole compatibility thing is done
with kexec-tools and the kernel. We probably would have to support
newer kexec-tools on an older kernel and vice versa so I'd guess we
should mark walk_iomem_res() deprecated so that people are encouraged to
upgrade to newer kexec-tools...


Hmmm.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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