linux-kernel - Re: [RFC v1 00/19] Modify zonelist to nodelist v1

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Message-ID: <20191121180401.GL23213@dhcp22.suse.cz>
Date:   Thu, 21 Nov 2019 19:04:01 +0100
From:   Michal Hocko <mhocko@...nel.org>
To:     Pengfei Li <fly@...nel.page>
Cc:     akpm@...ux-foundation.org, mgorman@...hsingularity.net,
        vbabka@...e.cz, cl@...ux.com, iamjoonsoo.kim@....com, guro@...com,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC v1 00/19] Modify zonelist to nodelist v1

On Thu 21-11-19 23:17:52, Pengfei Li wrote:
[...]
> Since I don't currently have multiple node NUMA systems, I would be
> grateful if anyone would like to test this series of patches.

I didn't really get to think about the actual patchset. From a very
quick glance I am wondering whether we need to optimize as there are
usually only small amount of numa nodes. But I am quite busy so I cannot
really do any claims.

Anyway, you can test this even without NUMA HW. Have a look at numa=fake
option (numa_emu_cmdline). Or you can use kvm/qemu which provides easy
ways to setup a NUMA capable virtual machine.
-- 
Michal Hocko
SUSE Labs