linux-kernel - Re: [PATCH v2 0/2] mm/gup: stop leaking pinned pages in low memory conditions

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Message-Id: <20241018151322.6dd3e6ccbbe73599f70179d4@linux-foundation.org>
Date: Fri, 18 Oct 2024 15:13:22 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: John Hubbard <jhubbard@...dia.com>
Cc: LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
 "Matthew Wilcox (Oracle)" <willy@...radead.org>, Alistair Popple
 <apopple@...dia.com>, Arnd Bergmann <arnd@...db.de>, Christoph Hellwig
 <hch@...radead.org>, Daniel Vetter <daniel.vetter@...ll.ch>, Dave Airlie
 <airlied@...hat.com>, David Hildenbrand <david@...hat.com>, Dongwon Kim
 <dongwon.kim@...el.com>, Gerd Hoffmann <kraxel@...hat.com>, Hugh Dickins
 <hughd@...gle.com>, Jason Gunthorpe <jgg@...dia.com>, Junxiao Chang
 <junxiao.chang@...el.com>, Mike Kravetz <mike.kravetz@...cle.com>, Minchan
 Kim <minchan@...nel.org>, Oscar Salvador <osalvador@...e.de>, Pasha
 Tatashin <pasha.tatashin@...een.com>, Peter Xu <peterx@...hat.com>, Shigeru
 Yoshida <syoshida@...hat.com>, Vivek Kasireddy <vivek.kasireddy@...el.com>
Subject: Re: [PATCH v2 0/2] mm/gup: stop leaking pinned pages in low memory
 conditions

On Thu, 17 Oct 2024 18:17:09 -0700 John Hubbard <jhubbard@...dia.com> wrote:

I added cc:stable to both of these.  Which might be inappropriate since
"patch #2 is not really required".

>   mm/gup: stop leaking pinned pages in low memory conditions

Fixes: 24a95998e9ba ("mm/gup.c: simplify and fix check_and_migrate_movable_pages() return codes")

In mainline since v6.1!

>   mm/gup: memfd: stop leaking pinned pages in low memory conditions

Fixes: 89c1905d9c14 ("mm/gup: introduce memfd_pin_folios() for pinning memfd folios")

Since v6.11.


So these are quite independent fixes.  Kernels 6.1.x ...  6.10.x will
have the first patch and not the second.  That's presumably an untested
combination, fingers crossed.