From: Pedro Falcato <pfalcato@suse.de>
To: David Hildenbrand <david@redhat.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
Vlastimil Babka <vbabka@suse.cz>, Jann Horn <jannh@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Jeff Xu <jeffxu@chromium.org>
Subject: Re: [PATCH 2/5] mm/mseal: move madvise() logic to mm/madvise.c
Date: Mon, 14 Jul 2025 16:31:59 +0100 [thread overview]
Message-ID: <nnm4cmygbeyzwxfwqduo5lq3d5cthuic5irof2l3tb5x43n2hz@mmjklktcfk2o> (raw)
In-Reply-To: <0925c64b-c721-4dc5-913a-c43a94dc64a3@redhat.com>
On Mon, Jul 14, 2025 at 05:03:03PM +0200, David Hildenbrand wrote:
> [...]
>
> But now I wonder, why is it okay to discard anon pages in a MAP_PRIVATE file
> mapping?
IIRC this was originally suggested by Linus, on one of the versions introducing
mseal. But the gist is that discarding pages is okay if you could already zero
them manually, using e.g memset. Hence the writeability checks.
--
Pedro
next prev parent reply other threads:[~2025-07-14 15:32 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-14 13:00 [PATCH 0/5] mseal cleanups Lorenzo Stoakes
2025-07-14 13:00 ` [PATCH 1/5] mm/mseal: always define VM_SEALED Lorenzo Stoakes
2025-07-14 14:31 ` David Hildenbrand
2025-07-14 15:20 ` Pedro Falcato
2025-07-14 15:32 ` Liam R. Howlett
2025-07-14 13:00 ` [PATCH 2/5] mm/mseal: move madvise() logic to mm/madvise.c Lorenzo Stoakes
2025-07-14 14:37 ` David Hildenbrand
2025-07-14 14:56 ` Lorenzo Stoakes
2025-07-14 15:03 ` David Hildenbrand
2025-07-14 15:18 ` Lorenzo Stoakes
2025-07-14 15:24 ` David Hildenbrand
2025-07-14 15:27 ` Lorenzo Stoakes
2025-07-14 15:37 ` David Hildenbrand
2025-07-14 15:31 ` Pedro Falcato [this message]
2025-07-14 15:37 ` Lorenzo Stoakes
2025-07-14 15:41 ` David Hildenbrand
2025-07-14 15:45 ` Lorenzo Stoakes
2025-07-14 15:52 ` David Hildenbrand
2025-07-14 16:01 ` Lorenzo Stoakes
2025-07-14 15:18 ` Pedro Falcato
2025-07-14 15:33 ` Liam R. Howlett
2025-07-14 13:00 ` [PATCH 3/5] mm/mseal: small cleanups Lorenzo Stoakes
2025-07-14 14:39 ` David Hildenbrand
2025-07-14 15:23 ` Pedro Falcato
2025-07-14 15:33 ` Liam R. Howlett
2025-07-14 13:00 ` [PATCH 4/5] mm/mseal: separate out and simplify VMA gap check Lorenzo Stoakes
2025-07-14 14:41 ` David Hildenbrand
2025-07-14 15:17 ` Pedro Falcato
2025-07-14 15:23 ` Lorenzo Stoakes
2025-07-14 15:25 ` David Hildenbrand
2025-07-14 15:32 ` Lorenzo Stoakes
2025-07-14 15:40 ` Liam R. Howlett
2025-07-14 15:35 ` Liam R. Howlett
2025-07-14 15:40 ` Lorenzo Stoakes
2025-07-14 15:43 ` Liam R. Howlett
2025-07-14 15:47 ` Lorenzo Stoakes
2025-07-14 13:00 ` [PATCH 5/5] mm/mseal: rework mseal apply logic Lorenzo Stoakes
2025-07-14 15:26 ` Pedro Falcato
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