Date: Mon, 31 Mar 2025 10:04:19 -0400 From: John Baldwin <jhb@FreeBSD.org> To: Andriy Gapon <avg@FreeBSD.org>, arch@FreeBSD.org Subject: Re: swapoff_all at shutdown time Message-ID: <7c178e10-f7de-452a-8c9f-d54d30e62b7f@FreeBSD.org> In-Reply-To: <679a6e57-2255-4e4f-bbd0-f38449622dc1@FreeBSD.org>
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On 3/26/25 10:11, Andriy Gapon wrote: > > This is more of a question than suggestion. > > I noticed that swapoff_all() at shutdown time seems to swap in all pages (for > non-dead objects). > > Does that really have to be done? > Can't we just "discard" those pages at that late stage of shutdown? > Especially now that we don't swap kernel stacks. That does seem odd, yes. I can understand why we might have needed the pages for a kstack, but I'm not sure if there are any other anon pages we might need during shutdown. Presumably not? -- John Baldwinhome | help
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