linux-kernel - Re: [PATCH -next v2 6/7] ext4: simply the mapping query logic in ext4_iomap

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Message-ID: <7846a127-c67e-491c-8d99-f00b9c472084@huaweicloud.com>
Date: Mon, 5 Jan 2026 09:18:50 +0800
From: Zhang Yi <yi.zhang@...weicloud.com>
To: Markus Elfring <Markus.Elfring@....de>, linux-ext4@...r.kernel.org,
 linux-fsdevel@...r.kernel.org, Baokun Li <libaokun1@...wei.com>,
 Jan Kara <jack@...e.cz>, Ojaswin Mujoo <ojaswin@...ux.ibm.com>,
 Theodore Ts'o <tytso@....edu>
Cc: LKML <linux-kernel@...r.kernel.org>,
 Andreas Dilger <adilger.kernel@...ger.ca>,
 Ritesh Harjani <ritesh.list@...il.com>, Yang Erkun <yangerkun@...wei.com>,
 Yu Kuai <yukuai@...as.com>, zhangyi <yizhang089@...il.com>
Subject: Re: [PATCH -next v2 6/7] ext4: simply the mapping query logic in
 ext4_iomap_begin()

On 1/4/2026 9:00 PM, Markus Elfring wrote:
>> In the write path mapping check of ext4_iomap_begin(), the return value
>> 'ret' should never greater than orig_mlen. If 'ret' equals 'orig_mlen',
>> it can be returned directly without checking IOMAP_ATOMIC.
> 
> See also once more:
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?h=v6.19-rc3#n94
> 
> 
> How do you think about to use the word “simplify” in the summary phrase?
> 
> Regards,
> Markus

Yeah, it makes sense to me, I will revise it in v3.

Thanks,
Yi.