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Message-ID: <ZpCFNA2VDoB_7waS@zx2c4.com>
Date: Fri, 12 Jul 2024 03:21:56 +0200
From: "Jason A. Donenfeld" <Jason@...c4.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, patches@...ts.linux.dev,
tglx@...utronix.de, linux-crypto@...r.kernel.org,
linux-api@...r.kernel.org, x86@...nel.org,
Linus Torvalds <torvalds@...ux-foundation.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Adhemerval Zanella Netto <adhemerval.zanella@...aro.org>,
Carlos O'Donell <carlos@...hat.com>,
Florian Weimer <fweimer@...hat.com>, Arnd Bergmann <arnd@...db.de>,
Jann Horn <jannh@...gle.com>,
Christian Brauner <brauner@...nel.org>,
David Hildenbrand <dhildenb@...hat.com>, linux-mm@...ck.org
Subject: Re: [PATCH v22 1/4] mm: add MAP_DROPPABLE for designating always
lazily freeable mappings
On Fri, Jul 12, 2024 at 12:29:17AM +0200, David Hildenbrand wrote:
> > I'll try to think of some corner cases we might be missing.
>
> Sorry that I keep coming up with corner cases :) But these should be easy to handle:
Thank you for coming up with them!
> We don't want to suddenly get pages that are swapbacked.
> Otherwise someone could place swapbacked pages in there (using UFFDIO_MOVE)
Both seem like reasonable concerns. Added to v+1.
Jason
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