Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().

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To: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Subject: Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
From: Michal Hocko <mhocko@xxxxxxxx>
Date: Fri, 23 Jun 2023 13:32:00 +0200
Cc: Petr Mladek <pmladek@xxxxxxxx>, Tetsuo Handa <penguin-kernel@xxxxxxxxxxxxxxxxxxx>, linux-mm@xxxxxxxxx, "Luis Claudio R. Goncalves" <lgoncalv@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, John Ogness <john.ogness@xxxxxxxxxxxxx>
In-reply-to: <20230623104530.vNMEDv9d@linutronix.de>
References: <20230621104034.HT6QnNkQ@linutronix.de> <0e9fc992-8e05-2e63-b3b1-d8d3ce89fc16@I-love.SAKURA.ne.jp> <20230621130641.-5iueY1I@linutronix.de> <dd7e0df5-a6c1-adef-af16-c0cf3a8aee65@I-love.SAKURA.ne.jp> <20230621143421.BgHjJklo@linutronix.de> <ZJMZWxDrkV3M1EQH@alley> <20230623081250.h20rlLik@linutronix.de> <ZJVj/UExtmFdBfdL@dhcp22.suse.cz> <20230623095804.Zf03Kn7H@linutronix.de> <20230623104530.vNMEDv9d@linutronix.de>

On Fri 23-06-23 12:45:30, Sebastian Andrzej Siewior wrote:
[...]
> nothing in dmesg. What did I do wrong not to enter
> __build_all_zonelists()?

You would need to online memory into a unpopulated node/zone. E.g. by
booting NUMA system with 2 numa nodes one of them empty and onlining
into that node.

-- 
Michal Hocko
SUSE Labs

References:
- [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Sebastian Andrzej Siewior
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Tetsuo Handa
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Sebastian Andrzej Siewior
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Tetsuo Handa
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Sebastian Andrzej Siewior
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Petr Mladek
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Sebastian Andrzej Siewior
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Michal Hocko
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Sebastian Andrzej Siewior
- Re: [PATCH] mm/page_alloc: Use write_seqlock_irqsave() instead write_seqlock() + local_irq_save().
  - From: Sebastian Andrzej Siewior

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