From: sashiko-bot@kernel.org
To: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
Cc: "Christian Borntraeger" <borntraeger@linux.ibm.com>,
"Alexander Gordeev" <agordeev@linux.ibm.com>,
"Vasily Gorbik" <gor@linux.ibm.com>,
linux-s390@vger.kernel.org, "Heiko Carstens" <hca@linux.ibm.com>
Subject: Re: [PATCH 12/12] mm: change the contract for free_pgtables(), update docs
Date: Tue, 01 Sep 2026 11:37:27 +0000 [thread overview]
Message-ID: <20260901113728.7C2D81F000E9@smtp.kernel.org> (raw)
In-Reply-To: <20260901-rcu-pagetable-freeing-v1-12-5456a81c8212@kernel.org>
> Now that page tables are freed after an RCU grace period, it is safe for
> page table walkers to walk page table ranges that are being concurrently
> torn down, provided the mm is kept alive via mmgrab().
>
> The comment block before pte_offset_map_lock() established a contract that
> this was unsafe, which was correct prior to these changes. Update it to
> reflect the change.
>
> Similarly update the process addresses documentation.
>
> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260901-rcu-pagetable-freeing-v1-0-5456a81c8212@kernel.org?part=12
next prev parent reply other threads:[~2026-09-01 11:37 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 11:01 [PATCH 00/12] mm: make userland page table freeing RCU-safe Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` [PATCH 01/12] mm/huge_memory: zap deposited page tables after an RCU grace period Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:18 ` sashiko-bot
2026-09-01 13:19 ` Kiryl Shutsemau
2026-09-01 13:19 ` Kiryl Shutsemau
2026-09-01 13:19 ` Kiryl Shutsemau
2026-09-01 14:12 ` Lorenzo Stoakes (ARM)
2026-09-01 14:12 ` Lorenzo Stoakes (ARM)
2026-09-01 14:12 ` Lorenzo Stoakes (ARM)
2026-09-01 14:24 ` Jason Gunthorpe
2026-09-01 14:24 ` Jason Gunthorpe
2026-09-01 14:24 ` Jason Gunthorpe
2026-09-01 14:41 ` Lorenzo Stoakes (ARM)
2026-09-01 14:41 ` Lorenzo Stoakes (ARM)
2026-09-01 14:41 ` Lorenzo Stoakes (ARM)
2026-09-01 15:28 ` Kiryl Shutsemau
2026-09-01 15:28 ` Kiryl Shutsemau
2026-09-01 15:28 ` Kiryl Shutsemau
2026-09-01 15:45 ` Lorenzo Stoakes (ARM)
2026-09-01 15:45 ` Lorenzo Stoakes (ARM)
2026-09-01 15:45 ` Lorenzo Stoakes (ARM)
2026-09-01 17:11 ` Kiryl Shutsemau
2026-09-01 17:11 ` Kiryl Shutsemau
2026-09-01 17:11 ` Kiryl Shutsemau
2026-09-01 17:14 ` Lorenzo Stoakes (ARM)
2026-09-01 17:14 ` Lorenzo Stoakes (ARM)
2026-09-01 17:14 ` Lorenzo Stoakes (ARM)
2026-09-01 15:54 ` Liam R. Howlett
2026-09-01 15:54 ` Liam R. Howlett
2026-09-01 15:54 ` Liam R. Howlett
2026-09-01 16:06 ` Jason Gunthorpe
2026-09-01 16:06 ` Jason Gunthorpe
2026-09-01 16:06 ` Jason Gunthorpe
2026-09-01 17:13 ` Kiryl Shutsemau
2026-09-01 17:13 ` Kiryl Shutsemau
2026-09-01 17:13 ` Kiryl Shutsemau
2026-09-01 17:47 ` Liam R. Howlett
2026-09-01 17:47 ` Liam R. Howlett
2026-09-01 17:47 ` Liam R. Howlett
2026-09-01 11:01 ` [PATCH 02/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for most 2-level architectures Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:22 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 03/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for MMU riscv Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:14 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 04/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for MMU arm Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:18 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 05/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for arc, microblaze, xtensa Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:28 ` sashiko-bot
2026-09-07 21:07 ` Suren Baghdasaryan
2026-09-07 21:07 ` Suren Baghdasaryan
2026-09-07 21:07 ` Suren Baghdasaryan
2026-09-08 11:28 ` Lorenzo Stoakes (ARM)
2026-09-08 11:28 ` Lorenzo Stoakes (ARM)
2026-09-08 11:28 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` [PATCH 06/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for sparc64 Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:23 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 07/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for m68k-coldfire Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:23 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 08/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for sh-X2 Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:30 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 09/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for m68k-motorola Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:30 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 10/12] mm: enable MMU_GATHER_RCU_TABLE_FREE for sparc32 Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:37 ` sashiko-bot
2026-09-01 11:01 ` [PATCH 11/12] mm: make userland page table freeing RCU-safe Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:52 ` sashiko-bot
2026-09-01 13:33 ` Kiryl Shutsemau
2026-09-01 13:33 ` Kiryl Shutsemau
2026-09-01 13:33 ` Kiryl Shutsemau
2026-09-01 14:03 ` Lorenzo Stoakes (ARM)
2026-09-01 14:03 ` Lorenzo Stoakes (ARM)
2026-09-01 14:03 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` [PATCH 12/12] mm: change the contract for free_pgtables(), update docs Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:01 ` Lorenzo Stoakes (ARM)
2026-09-01 11:37 ` sashiko-bot [this message]
2026-09-01 13:57 ` Kiryl Shutsemau
2026-09-01 13:57 ` Kiryl Shutsemau
2026-09-01 13:57 ` Kiryl Shutsemau
2026-09-01 14:31 ` Lorenzo Stoakes (ARM)
2026-09-01 14:31 ` Lorenzo Stoakes (ARM)
2026-09-01 14:31 ` Lorenzo Stoakes (ARM)
2026-09-01 17:15 ` Kiryl Shutsemau
2026-09-01 17:15 ` Kiryl Shutsemau
2026-09-01 17:15 ` Kiryl Shutsemau
2026-09-01 17:25 ` Lorenzo Stoakes (ARM)
2026-09-01 17:25 ` Lorenzo Stoakes (ARM)
2026-09-01 17:25 ` Lorenzo Stoakes (ARM)
2026-09-07 16:53 ` Suren Baghdasaryan
2026-09-07 16:53 ` Suren Baghdasaryan
2026-09-07 16:53 ` Suren Baghdasaryan
2026-09-08 11:29 ` Lorenzo Stoakes (ARM)
2026-09-08 11:29 ` Lorenzo Stoakes (ARM)
2026-09-08 11:29 ` Lorenzo Stoakes (ARM)
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