linux-kernel - Re: [PATCH] mm: don't warn if the node is offlined

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Message-ID: <Y2NzvfCjd0X4g4p4@dhcp22.suse.cz>
Date:   Thu, 3 Nov 2022 08:54:37 +0100
From:   Michal Hocko <mhocko@...e.com>
To:     Yang Shi <shy828301@...il.com>
Cc:     Zach O'Keefe <zokeefe@...gle.com>, akpm@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Andrew Davidoff <davidoff@...mf.net>,
        Bob Liu <lliubbo@...il.com>
Subject: Re: [PATCH] mm: don't warn if the node is offlined

On Wed 02-11-22 13:08:08, Yang Shi wrote:
[...]
> So I think we narrowed down to two options:
> 1. Preserve the interleave behavior but bail out if the target node is
> not online (it is also racy, but doesn't hurt)

I do not think there is merit in the interleave patch is dubious to say
the least.

> 2. Remove the node balance code entirely

Yes, removing the balancing makes sense but I would still hope that we
do not fail too easily if the range is populated on multiple nodes
equally. In practice it will likely not matter much I guess but setting
up all nodes with top score is just easy to achieve.
-- 
Michal Hocko
SUSE Labs