linux-kernel - Re: [PATCH 1/2 v2] kdump: add the vmcoreinfo documentation

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Message-ID: <20181210183221.GA5482@zn.tnic>
Date:   Mon, 10 Dec 2018 19:32:21 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Kazuhito Hagio <k-hagio@...jp.nec.com>
Cc:     lijiang <lijiang@...hat.com>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "bhe@...hat.com" <bhe@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        "x86@...nel.org" <x86@...nel.org>,
        "kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "dyoung@...hat.com" <dyoung@...hat.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
Subject: Re: [PATCH 1/2 v2] kdump: add the vmcoreinfo documentation

On Wed, Dec 05, 2018 at 08:29:14PM +0000, Kazuhito Hagio wrote:
> Please note that this VMCOREINFO is generated from the information in
> the vmlinux only, not from the running kernel and /proc/kcore. So if
> we add a command to dump it from running kernel, it's not suitable.

Sure, I used a vmlinux for that.

> makedumpfile doesn't have any switch which dumps VMCOREINFO from kcore
> for now. (I'm thinking to have makedumpfile dump it as debug message,
> though.)

Might be useful as people are looking into using VMCOREINFO when
debugging a live kernel...

-- 
Regards/Gruss,
    Boris.

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