linux-kernel - Re: mlockall(MCL_CURRENT) blocking infinitely

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Message-ID: <94c71621a0245db763db9e289286b79056cc9bc5.camel@gmx.de>
Date:   Wed, 06 Nov 2019 18:03:10 +0100
From:   Robert Stupp <snazy@....de>
To:     Josef Bacik <josef@...icpanda.com>, Jan Kara <jack@...e.cz>
Cc:     Johannes Weiner <hannes@...xchg.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Michal Hocko <mhocko@...nel.org>,
        "Kirill A. Shutemov" <kirill@...temov.name>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-kernel@...r.kernel.org, Linux MM <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Potyra, Stefan" <Stefan.Potyra@...ktrobit.com>
Subject: Re: mlockall(MCL_CURRENT) blocking infinitely

Oh, and I just realized, that I have two custom settings in my
/etc/rc.local - guess, I configured that when I installed that machine
years ago. Sorry, that I haven't mentioned that earlier.

echo 0 > /sys/block/nvme0n1/queue/read_ahead_kb
echo never >
/sys/kernel/mm/transparent_hugepage/defrag

That setting is probably not quite standard, but I assume there are
some database server setups out there, that set RA=0 as well.