From: Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>
To: Cen Zhang <zzzccc427@gmail.com>, jaegeuk@kernel.org
Cc: baijiaju1990@gmail.com, linux-kernel@vger.kernel.org,
linux-f2fs-devel@lists.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH] f2fs: annotate lockless NAT counter reads
Date: Sat, 9 May 2026 21:17:14 +0800 [thread overview]
Message-ID: <04ab5f17-2f63-49e4-8d4b-af781f5ff704@kernel.org> (raw)
In-Reply-To: <20260505125510.1369132-1-zzzccc427@gmail.com>
On 5/5/26 20:55, Cen Zhang wrote:
> nat_cnt[] is updated while callers hold nat_tree_lock, but F2FS samples
> the counters locklessly in f2fs_available_free_memory(),
> excess_dirty_nats(), and excess_cached_nats(). Those helpers only steer
> cache reclaim and background sync heuristics; they do not control NAT
> entry lifetime or checkpoint correctness.
>
> Document the intent with data_race(READ_ONCE()) and a short comment
> instead of adding locking to the balance path.
>
> Signed-off-by: Cen Zhang <zzzccc427@gmail.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Thanks,
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next prev parent reply other threads:[~2026-05-09 13:17 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-05 12:55 [f2fs-dev] [PATCH] f2fs: annotate lockless NAT counter reads Cen Zhang
2026-05-09 13:17 ` Chao Yu via Linux-f2fs-devel [this message]
2026-05-11 1:41 ` patchwork-bot+f2fs--- via Linux-f2fs-devel
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