linux-kernel - Re: [PATCH 1/2 v6] kdump: add the vmcoreinfo documentation

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Date:   Mon, 14 Jan 2019 19:01:42 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Kazuhito Hagio <k-hagio@...jp.nec.com>
Cc:     Lianbo Jiang <lijiang@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "x86@...nel.org" <x86@...nel.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "bhe@...hat.com" <bhe@...hat.com>,
        "dyoung@...hat.com" <dyoung@...hat.com>,
        "anderson@...hat.com" <anderson@...hat.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH 1/2 v6] kdump: add the vmcoreinfo documentation

On Mon, Jan 14, 2019 at 05:48:48PM +0000, Kazuhito Hagio wrote:
> As for makedumpfile, it will be not impossible to remove the
> init_uts_ns.name.relase (OSRELEASE), but some fixes are needed.
> Because historically OSRELEASE has been a kind of a mandatory entry
> in vmcoreinfo from the beginning of vmcoreinfo, so makedumpfile uses
> its existence to check whether a vmcoreinfo is sane.

Well, init_uts_ns is exported in vmcoreinfo anyway - makedumpfile
can simply test init_uts_ns.name.release just as well. And the
"historically" argument doesn't matter because vmcoreinfo is not an ABI.

So makedumpfile needs to be changed to check that new export.

> Also, I think crash also will need to be fixed if it is removed.

Yes, I'm expecting user tools to be fixed and then exports removed.

-- 
Regards/Gruss,
    Boris.

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