From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Kalesh Singh <kaleshsingh@google.com>,
Anthony Yznaga <anthony.yznaga@oracle.com>
Cc: linux-mm@kvack.org, akpm@linux-foundation.org,
andreyknvl@gmail.com, arnd@arndb.de, bp@alien8.de,
brauner@kernel.org, bsegall@google.com, corbet@lwn.net,
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jannh@google.com, juri.lelli@redhat.com, khalid@kernel.org,
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lorenzo.stoakes@oracle.com, luto@kernel.org,
markhemm@googlemail.com, maz@kernel.org, mhiramat@kernel.org,
mgorman@suse.de, mhocko@suse.com, mingo@redhat.com,
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vbabka@suse.cz, vincent.guittot@linaro.org,
viro@zeniv.linux.org.uk, vschneid@redhat.com,
willy@infradead.org, x86@kernel.org, xhao@linux.alibaba.com,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org
Subject: Re: [PATCH v3 00/22] Add support for shared PTEs across processes
Date: Tue, 24 Feb 2026 10:40:30 +0100 [thread overview]
Message-ID: <b82a5ac3-33e9-4cbf-892a-f0c7f6fe0c20@kernel.org> (raw)
In-Reply-To: <CAC_TJvcaJdEzK8n9BK0qgEXdzjzXtbA_Zk-ybfmG8kjNExVCzw@mail.gmail.com>
> I believe that managing a pseudo-filesystem (msharefs) and mapping via
> ioctl during process creation could introduce overhead that impacts
> app startup latency. Ideally, child apps shouldn't be aware of this
> sharing or need to manage the pseudo-filesystem on their end.
All process must be aware of these special semantics.
I'd assume that fork() would simply replicate mshare region into the
fork'ed child process. So from that point of view, it's "transparent" as
in "no special mshare() handling required after fork".
--
Cheers,
David
prev parent reply other threads:[~2026-02-24 9:40 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-20 1:03 Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 01/22] mm: Add msharefs filesystem Anthony Yznaga
2025-09-08 18:29 ` Liam R. Howlett
2025-09-08 19:09 ` Anthony Yznaga
2025-09-10 12:14 ` Pedro Falcato
2025-09-10 12:46 ` David Hildenbrand
2025-08-20 1:03 ` [PATCH v3 02/22] mm/mshare: pre-populate msharefs with information file Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 03/22] mm/mshare: make msharefs writable and support directories Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 04/22] mm/mshare: allocate an mm_struct for msharefs files Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 05/22] mm/mshare: add ways to set the size of an mshare region Anthony Yznaga
2025-08-20 1:03 ` [PATCH v3 06/22] mm/mshare: Add a vma flag to indicate " Anthony Yznaga
2025-09-08 18:45 ` David Hildenbrand
2025-09-08 18:56 ` Anthony Yznaga
2025-09-08 19:02 ` David Hildenbrand
2025-09-08 19:03 ` Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 07/22] mm/mshare: Add mmap support Anthony Yznaga
2025-08-20 19:02 ` kernel test robot
2025-08-20 1:04 ` [PATCH v3 08/22] mm/mshare: flush all TLBs when updating PTEs in an mshare range Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 09/22] sched/numa: do not scan msharefs vmas Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 10/22] mm: add mmap_read_lock_killable_nested() Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 11/22] mm: add and use unmap_page_range vm_ops hook Anthony Yznaga
2025-08-21 15:40 ` kernel test robot
2025-08-20 1:04 ` [PATCH v3 12/22] mm: introduce PUD page table shared count Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 13/22] mm/mshare: prepare for page table sharing support Anthony Yznaga
2025-09-15 15:27 ` Lorenzo Stoakes
2025-08-20 1:04 ` [PATCH v3 14/22] x86/mm: enable page table sharing Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 15/22] mm: create __do_mmap() to take an mm_struct * arg Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 16/22] mm: pass the mm in vma_munmap_struct Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 17/22] sched/mshare: mshare ownership Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 18/22] mm/mshare: Add an ioctl for mapping objects in an mshare region Anthony Yznaga
2025-08-20 20:36 ` kernel test robot
2025-08-20 1:04 ` [PATCH v3 19/22] mm/mshare: Add an ioctl for unmapping " Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 20/22] mm/mshare: support mapping files and anon hugetlb " Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 21/22] mm/mshare: provide a way to identify an mm as an mshare host mm Anthony Yznaga
2025-08-20 1:04 ` [PATCH v3 22/22] mm/mshare: charge fault handling allocations to the mshare owner Anthony Yznaga
2025-09-08 18:50 ` David Hildenbrand
2025-09-08 19:21 ` Anthony Yznaga
2025-09-08 20:28 ` David Hildenbrand
2025-09-08 20:55 ` Anthony Yznaga
2025-09-08 20:32 ` [PATCH v3 00/22] Add support for shared PTEs across processes David Hildenbrand
2025-09-08 20:59 ` Matthew Wilcox
2025-09-08 21:14 ` Anthony Yznaga
2025-09-09 7:53 ` David Hildenbrand
2025-09-09 18:29 ` Anthony Yznaga
2025-09-09 19:06 ` Lorenzo Stoakes
2026-02-20 21:35 ` Kalesh Singh
2026-02-21 12:40 ` Pedro Falcato
2026-02-23 17:43 ` Kalesh Singh
2026-02-23 19:55 ` anthony.yznaga
2026-02-24 9:40 ` David Hildenbrand (Arm) [this message]
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