linux-kernel - Re: [f2fs-dev] [PATCH v2] f2fs: optimize f2fs_overwrite_io() for f2fs_iomap

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Message-Id: 
 <177075890757.3671709.12809959884362894465.git-patchwork-notify@kernel.org>
Date: Tue, 10 Feb 2026 21:28:27 +0000
From: patchwork-bot+f2fs@...nel.org
To: Yeongjin Gil <youngjin.gil@...sung.com>
Cc: jaegeuk@...nel.org, chao@...nel.org, jyh429@...il.com,
 linux-f2fs-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
 sj1557.seo@...sung.com
Subject: Re: [f2fs-dev] [PATCH v2] f2fs: optimize f2fs_overwrite_io() for
 f2fs_iomap_begin

Hello:

This patch was applied to jaegeuk/f2fs.git (dev)
by Jaegeuk Kim <jaegeuk@...nel.org>:

On Thu, 22 Jan 2026 19:45:27 +0900 you wrote:
> When overwriting already allocated blocks, f2fs_iomap_begin() calls
> f2fs_overwrite_io() to check block mappings. However,
> f2fs_overwrite_io() iterates through all mapped blocks in the range,
> which can be inefficient for fragmented files with large I/O requests.
> 
> This patch optimizes f2fs_overwrite_io() by adding a 'check_first'
> parameter and introducing __f2fs_overwrite_io() helper. When called from
> f2fs_iomap_begin(), we only check the first mapping to determine if the
> range is already allocated, which is sufficient for setting
> map.m_may_create.
> 
> [...]

Here is the summary with links:
  - [f2fs-dev,v2] f2fs: optimize f2fs_overwrite_io() for f2fs_iomap_begin
    https://git.kernel.org/jaegeuk/f2fs/c/d860974a7e38

You are awesome, thank you!
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