linux-kernel - Re: Kernel crash after "mm: initialize pages on demand during boot"

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Date:   Wed, 27 Jun 2018 11:06:14 -0400
From:   Pavel Tatashin <pasha.tatashin@...cle.com>
To:     herton@...hat.com
Cc:     mhocko@...nel.org, LKML <linux-kernel@...r.kernel.org>,
        Mel Gorman <mgorman@...e.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Masayoshi Mizuma <m.mizuma@...fujitsu.com>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        Steven Sistare <steven.sistare@...cle.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Miles Chen <miles.chen@...iatek.com>,
        Paul Burton <paul.burton@...s.com>,
        Wei Yang <richard.weiyang@...il.com>,
        Yaowei Bai <baiyaowei@...s.chinamobile.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Gioh Kim <gi-oh.kim@...fitbricks.com>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        linux-mm@...r.kernel.org, aquini@...hat.com, lwoodman@...hat.com,
        n-horiguchi@...jp.nec.com
Subject: Re: Kernel crash after "mm: initialize pages on demand during boot"

On Wed, Jun 27, 2018 at 10:15 AM Herton R. Krzesinski <herton@...hat.com> wrote:
> Thanks, I'll try it. It'll probably work since I tried memory_reserve
> but "hacking" it at e820__register_nosave_regions, anyway I'll confirm
> it here.

If it works, please send the new "Reserved but unavailable" value from dmesg:
[    0.000000] Reserved but unavailable: 103 pages

Thank you,
Pavel