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From: Michal Hocko <>
To: Mel Gorman <>
Cc: Andrew Morton <>,
	Linux-MM <>,
	LKML <>,
	Oscar Salvador <>,
	"Michael S. Tsirkin" <>,
	David Hildenbrand <>,
	Vlastimil Babka <>,
	Alexander Duyck <>,
	Minchan Kim <>
Subject: Re: [PATCH] mm/memory_hotplug: Make unpopulated zones PCP structures unreachable during hot remove
Date: Sat, 10 Apr 2021 09:25:52 +0200
Message-ID: <> (raw)
In-Reply-To: <>

On Fri 09-04-21 16:12:59, Mel Gorman wrote:
> If anything, the minimal "fix" is to simply delete IRQ disable/enable on
> the grounds that IRQs protect nothing and assume the existing hotplug
> paths guarantees the PCP cannot be used after zone_pcp_enable(). That
> should be the case already because all the pages have been freed and
> there is nothing to even put into the PCPs but I worried that the PCP
> structure itself might still be reachable even if it's useless which is
> why I freed the structure once they could not be reached via zonelists.

OK. Let's do that for now and I will put a follow up on my todo list.

Michal Hocko

      parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-09 12:09 Mel Gorman
2021-04-09 12:42 ` Michal Hocko
2021-04-09 12:48   ` Michal Hocko
2021-04-09 13:42     ` Mel Gorman
2021-04-09 14:37       ` Michal Hocko
2021-04-09 15:12         ` Mel Gorman
2021-04-09 19:05           ` David Hildenbrand
2021-04-10  7:25           ` Michal Hocko [this message]

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