From: Jann Horn <jannh@google.com>
To: Pedro Falcato <pfalcato@suse.de>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
Andrew Morton <akpm@linux-foundation.org>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
David Hildenbrand <david@redhat.com>,
Vlastimil Babka <vbabka@suse.cz>, Arnd Bergmann <arnd@arndb.de>,
Christian Brauner <brauner@kernel.org>,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-kernel@vger.kernel.org, SeongJae Park <sj@kernel.org>,
Usama Arif <usamaarif642@gmail.com>
Subject: Re: [RFC PATCH 4/5] mm/madvise: add PMADV_SET_FORK_EXEC_DEFAULT process_madvise() flag
Date: Tue, 20 May 2025 18:11:49 +0200 [thread overview]
Message-ID: <CAG48ez2+UEifqF=GRat0dStPfDNXzzewHU=zxj0+FbOXL=mKVQ@mail.gmail.com> (raw)
In-Reply-To: <czd62f2vzwv6fow4ikvzlkjdj5odhc3nhtc72onwip52baobg5@yc5pjiqoqnh4>
On Tue, May 20, 2025 at 10:38 AM Pedro Falcato <pfalcato@suse.de> wrote:
> - PMADV_INHERIT_FORK. This makes it so the flag is propagated to child processes (does not imply PMADV_FUTURE)
Do we think there will be flags settable through this API that we
explicitly _don't_ want to inherit on fork()? My understanding is that
sort of the default for fork() is to inherit everything, and things
that don't get inherited are weird special cases (like mlock() state).
(While the default for execve() is to inherit nothing about the MM.)
(I guess you could make a case that in a fork+exec sequence, the child
might not want to create hugepage between fork and exec... but this is
probably not the right place to control that?)
next prev parent reply other threads:[~2025-05-20 16:12 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-19 20:52 [RFC PATCH 0/5] add process_madvise() flags to modify behaviour Lorenzo Stoakes
2025-05-19 20:52 ` [RFC PATCH 1/5] mm: madvise: refactor madvise_populate() Lorenzo Stoakes
2025-05-20 10:30 ` David Hildenbrand
2025-05-20 10:36 ` Lorenzo Stoakes
2025-05-20 10:42 ` David Hildenbrand
2025-05-22 12:32 ` Mike Rapoport
2025-05-19 20:52 ` [RFC PATCH 2/5] mm/madvise: add PMADV_SKIP_ERRORS process_madvise() flag Lorenzo Stoakes
2025-05-19 20:52 ` [RFC PATCH 3/5] mm/madvise: add PMADV_NO_ERROR_ON_UNMAPPED " Lorenzo Stoakes
2025-05-19 20:52 ` [RFC PATCH 4/5] mm/madvise: add PMADV_SET_FORK_EXEC_DEFAULT " Lorenzo Stoakes
2025-05-20 8:38 ` Pedro Falcato
2025-05-20 10:21 ` Lorenzo Stoakes
2025-05-20 11:41 ` Pedro Falcato
2025-05-20 13:39 ` Lorenzo Stoakes
2025-05-20 16:11 ` Jann Horn [this message]
2025-05-20 16:19 ` Lorenzo Stoakes
2025-05-20 16:35 ` David Hildenbrand
2025-05-20 22:26 ` Johannes Weiner
2025-05-29 14:46 ` Lorenzo Stoakes
2025-05-19 20:52 ` [RFC PATCH 5/5] mm/madvise: add PMADV_ENTIRE_ADDRESS_SPACE " Lorenzo Stoakes
2025-05-19 21:53 ` [RFC PATCH 0/5] add process_madvise() flags to modify behaviour Jann Horn
2025-05-20 5:35 ` Lorenzo Stoakes
2025-05-20 16:04 ` Jann Horn
2025-05-20 16:14 ` Lorenzo Stoakes
2025-05-20 15:28 ` David Hildenbrand
2025-05-20 17:47 ` Lorenzo Stoakes
2025-05-20 18:24 ` Usama Arif
2025-05-20 19:21 ` Lorenzo Stoakes
2025-05-20 19:42 ` Usama Arif
2025-05-20 20:15 ` Lorenzo Stoakes
2025-05-20 18:25 ` Lorenzo Stoakes
2025-05-20 18:39 ` David Hildenbrand
2025-05-20 18:25 ` Shakeel Butt
2025-05-20 18:45 ` Lorenzo Stoakes
2025-05-20 19:49 ` Shakeel Butt
2025-05-20 20:39 ` Lorenzo Stoakes
2025-05-20 22:02 ` Shakeel Butt
2025-05-21 4:21 ` Lorenzo Stoakes
2025-05-21 16:28 ` Shakeel Butt
2025-05-21 16:49 ` Lorenzo Stoakes
2025-05-21 17:39 ` Shakeel Butt
2025-05-22 13:05 ` David Hildenbrand
2025-05-22 13:21 ` Lorenzo Stoakes
2025-05-22 20:53 ` Shakeel Butt
2025-05-26 12:57 ` David Hildenbrand
2025-05-21 16:57 ` Usama Arif
2025-05-21 17:39 ` Lorenzo Stoakes
2025-05-21 18:25 ` Usama Arif
2025-05-21 18:40 ` Lorenzo Stoakes
2025-05-21 18:45 ` Usama Arif
2025-05-21 17:32 ` Johannes Weiner
2025-05-21 18:11 ` Lorenzo Stoakes
2025-05-22 12:45 ` David Hildenbrand
2025-05-22 13:49 ` Lorenzo Stoakes
2025-05-22 15:32 ` Mike Rapoport
2025-05-22 15:47 ` Lorenzo Stoakes
2025-05-21 2:16 ` Liam R. Howlett
2025-05-22 12:12 ` Mike Rapoport
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