linux-kernel - Re: [PATCH] hugetlb: Add nohugepages parameter to prevent hugepages creation

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Message-ID: <CAHD1Q_x+m0ZT_xfLV3j6ma3Cc88fk9KnoS4yytS=PHBvJN7nnQ@mail.gmail.com>
Date:   Fri, 11 Oct 2019 21:41:01 -0300
From:   Guilherme Piccoli <gpiccoli@...onical.com>
To:     Qian Cai <cai@....pw>
Cc:     linux-mm@...ck.org, mike.kravetz@...cle.com,
        linux-kernel@...r.kernel.org,
        Jay Vosburgh <jay.vosburgh@...onical.com>,
        "Guilherme G. Piccoli" <kernel@...ccoli.net>
Subject: Re: [PATCH] hugetlb: Add nohugepages parameter to prevent hugepages creation

On Fri, Oct 11, 2019 at 8:52 PM Qian Cai <cai@....pw> wrote:
>
>
> It simply error-prone to reuse the sysctl.conf from the first kernel, as it could contains lots of things that will kill kdump kernel.

Makes sense, I agree with you. But still, there's no
formal/right/single way to do kdump, so I don't think we should rely
on "rootfs kdump is wrong" to refuse this patch's idea. If so, we
should then formalize the right way of kdumping.
Of course, this is only my opinion, let's see what people think about it!

Thanks,

Guilherme