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Date:   Sun, 17 Feb 2019 23:51:51 +0000
From:   "Richard W.M. Jones" <>
To:     Pavel Machek <>
Cc:, kernel list <>,
        Andrew Morton <>
Subject: Re: nbd, nbdkit, loopback mounts and memory management

On Mon, Feb 18, 2019 at 12:15:14AM +0100, Pavel Machek wrote:
> But Shaun reported it happened somehow often for them, so he might
> have a practical test case... better than my theories :-).

Yes, certainly not saying this isn't a problem.

I think the good news is the fix seems quite easy, ie. to add mlockall
and adjust the OOM killer score, as is done currently in the client:

For now I have added a note in the TODO file to follow up in case we
get a test case or reports of a problem:



Richard Jones, Virtualization Group, Red Hat
Read my programming and virtualization blog:
libguestfs lets you edit virtual machines.  Supports shell scripting,
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