From: sashiko-bot@kernel.org
To: "Jinjie Ruan" <ruanjinjie@huawei.com>
Cc: "Oleksij Rempel" <o.rempel@pengutronix.de>,
"Marc Kleine-Budde" <mkl@pengutronix.de>,
tytso@mit.edu, "Vincent Mailhol" <mailhol@kernel.org>,
linux-can@vger.kernel.org, linux-ext4@vger.kernel.org,
"Oliver Hartkopp" <socketcan@hartkopp.net>
Subject: Re: [PATCH 04/11] fs: Use acquire/release for fdtable resize synchronization
Date: Wed, 26 Aug 2026 09:54:23 +0000 [thread overview]
Message-ID: <20260826095424.516661F00AC4@smtp.kernel.org> (raw)
In-Reply-To: <20260825095422.3166067-5-ruanjinjie@huawei.com>
> Replace the smp_wmb()/smp_rmb() barrier pair with
> smp_store_release()/smp_load_acquire() on `files->resize_in_progress`.
> The flag is the publish point for fdtable expansion: writers clear it
> via release after rcu_assign_pointer(), readers check it via acquire
> before rcu_dereference_sched(). Observing it clear guarantees the new
> fdt pointer is visible.
>
> This expresses the pattern more clearly and allows cheaper one-way
> barriers on weakly-ordered architectures (e.g. arm64 STLR/LDAR vs
> DMB ISHST/ISHLD).
>
> Assisted-by: DeepSeek:DeepSeek-V3
> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260825095422.3166067-1-ruanjinjie@huawei.com?part=4
next prev parent reply other threads:[~2026-08-26 9:54 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-25 9:54 [PATCH 00/11] Convert barrier pairs to acquire/release for better performance Jinjie Ruan
2026-08-25 9:54 ` [PATCH 01/11] user_namespace: Use acquire/release for nr_extents synchronization Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 02/11] lib/vsprintf: Use acquire/release for ptr_key publication Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 03/11] fs: aio: Use acquire/release for ring->tail publication Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 04/11] fs: Use acquire/release for fdtable resize synchronization Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot [this message]
2026-08-25 9:54 ` [PATCH 05/11] pidfs: Use test_bit_acquire() for attr flag tests Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 06/11] super: Use acquire for SB_BORN check in super_cache_count() Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 07/11] ext4: Convert group-count barrier protocol to acquire/release Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 08/11] soreuseport: publish num_socks with acquire/release Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 09/11] net: sched: act_gact: use acquire/release for tcfg_ptype Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 10/11] 8021q: publish vlan_devices_arrays entries with acquire/release Jinjie Ruan
2026-08-26 9:54 ` sashiko-bot
2026-08-25 9:54 ` [PATCH 11/11] can: isotp: publish tx.state with smp_store_release() Jinjie Ruan
2026-08-25 11:46 ` Oliver Hartkopp
2026-08-26 3:33 ` Jinjie Ruan
2026-08-26 8:04 ` Oliver Hartkopp
2026-08-26 9:54 ` sashiko-bot
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