From: Pasha Tatashin <pasha.tatashin@soleen.com>
To: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com,
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Subject: Re: [PATCH v5 18/22] docs: add documentation for memfd preservation via LUO
Date: Thu, 13 Nov 2025 11:55:25 -0500 [thread overview]
Message-ID: <CA+CK2bBmSD_YftJ-9w1zidLz2=a4NynnLz_gLPsScF145bu5dQ@mail.gmail.com> (raw)
In-Reply-To: <20251107210526.257742-19-pasha.tatashin@soleen.com>
> +Limitations
> +===========
> +
> +The current implementation has the following limitations:
> +
> +Size
> + Currently the size of the file is limited by the size of the FDT. The FDT can
> + be at of most ``MAX_PAGE_ORDER`` order. By default this is 4 MiB with 4K
> + pages. Each page in the file is tracked using 16 bytes. This limits the
> + maximum size of the file to 1 GiB.
The above should be removed, as we are using KHO vmalloc that resolves
this limitation. Pratyush, I suggest for v6 let's move memfd
documnetation right into the code: memfd_luo.c and
liveupdate/abi/memfd.h, and source it from there.
Keeping documentation with the code helps reduce code/doc divergence.
Pasha
next prev parent reply other threads:[~2025-11-13 16:56 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-07 21:02 [PATCH v5 00/22] Live Update Orchestrator Pasha Tatashin
2025-11-07 21:02 ` [PATCH v5 01/22] liveupdate: luo_core: luo_ioctl: " Pasha Tatashin
2025-11-13 13:37 ` Mike Rapoport
2025-11-13 13:56 ` Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 02/22] liveupdate: luo_core: integrate with KHO Pasha Tatashin
2025-11-10 13:00 ` Mike Rapoport
2025-11-10 15:43 ` Pasha Tatashin
2025-11-11 20:16 ` Mike Rapoport
2025-11-11 20:57 ` Pasha Tatashin
2025-11-12 13:25 ` Mike Rapoport
2025-11-12 14:58 ` Pasha Tatashin
2025-11-13 16:31 ` Mike Rapoport
2025-11-13 18:38 ` Pasha Tatashin
2025-11-11 20:25 ` Mike Rapoport
2025-11-11 20:39 ` Pasha Tatashin
2025-11-11 20:42 ` Pasha Tatashin
2025-11-12 10:21 ` Mike Rapoport
2025-11-12 12:46 ` Pasha Tatashin
2025-11-12 13:33 ` Mike Rapoport
2025-11-12 15:14 ` Pasha Tatashin
2025-11-12 17:39 ` Pasha Tatashin
2025-11-14 11:29 ` Mike Rapoport
2025-11-14 14:48 ` Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 03/22] reboot: call liveupdate_reboot() before kexec Pasha Tatashin
2025-11-14 11:30 ` Mike Rapoport
2025-11-07 21:03 ` [PATCH v5 04/22] liveupdate: Kconfig: Make debugfs optional Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 05/22] liveupdate: kho: when live update add KHO image during kexec load Pasha Tatashin
2025-11-10 12:47 ` Mike Rapoport
2025-11-10 15:31 ` Pasha Tatashin
2025-11-11 20:18 ` Mike Rapoport
2025-11-11 20:59 ` Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 06/22] liveupdate: luo_session: add sessions support Pasha Tatashin
2025-11-12 20:39 ` Mike Rapoport
2025-11-12 20:47 ` Pasha Tatashin
2025-11-14 12:49 ` Mike Rapoport
2025-11-14 14:07 ` Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 07/22] liveupdate: luo_ioctl: add user interface Pasha Tatashin
2025-11-14 12:57 ` Mike Rapoport
2025-11-14 14:09 ` Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 08/22] liveupdate: luo_file: implement file systems callbacks Pasha Tatashin
2025-11-10 17:27 ` Pratyush Yadav
2025-11-10 17:42 ` Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 09/22] liveupdate: luo_session: Add ioctls for file preservation and state management Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 10/22] liveupdate: luo_flb: Introduce File-Lifecycle-Bound global state Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 11/22] docs: add luo documentation Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 12/22] MAINTAINERS: add liveupdate entry Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 13/22] mm: shmem: use SHMEM_F_* flags instead of VM_* flags Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 14/22] mm: shmem: allow freezing inode mapping Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 15/22] mm: shmem: export some functions to internal.h Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 16/22] liveupdate: luo_file: add private argument to store runtime state Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 17/22] mm: memfd_luo: allow preserving memfd Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 18/22] docs: add documentation for memfd preservation via LUO Pasha Tatashin
2025-11-13 16:55 ` Pasha Tatashin [this message]
2025-11-13 16:59 ` Pratyush Yadav
2025-11-07 21:03 ` [PATCH v5 19/22] selftests/liveupdate: Add userspace API selftests Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 20/22] selftests/liveupdate: Add kexec-based selftest for session lifecycle Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 21/22] selftests/liveupdate: Add kexec test for multiple and empty sessions Pasha Tatashin
2025-11-07 21:03 ` [PATCH v5 22/22] tests/liveupdate: Add in-kernel liveupdate test Pasha Tatashin
2025-11-12 20:23 ` Mike Rapoport
2025-11-12 20:40 ` Pasha Tatashin
2025-11-16 18:36 ` Mike Rapoport
2025-11-17 14:09 ` Pasha Tatashin
2025-11-07 22:33 ` [PATCH v5 00/22] Live Update Orchestrator Andrew Morton
2025-11-08 18:13 ` Pasha Tatashin
2025-11-08 18:36 ` Andrew Morton
2025-11-09 2:31 ` Pasha Tatashin
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