linux-kernel - Re: [RFC PATCH -next v3 07/10] fs: introduce FALLOC_FL_WRITE

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Message-ID: <75df71e2-5d0c-42bd-b80d-bdda5444eddb@huaweicloud.com>
Date: Fri, 18 Apr 2025 14:44:43 +0800
From: Zhang Yi <yi.zhang@...weicloud.com>
To: Christian Brauner <brauner@...nel.org>, Christoph Hellwig <hch@....de>
Cc: linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org,
 linux-block@...r.kernel.org, dm-devel@...ts.linux.dev,
 linux-nvme@...ts.infradead.org, linux-scsi@...r.kernel.org,
 linux-xfs@...r.kernel.org, linux-kernel@...r.kernel.org, tytso@....edu,
 djwong@...nel.org, john.g.garry@...cle.com, bmarzins@...hat.com,
 chaitanyak@...dia.com, shinichiro.kawasaki@....com, yi.zhang@...wei.com,
 chengzhihao1@...wei.com, yukuai3@...wei.com, yangerkun@...wei.com
Subject: Re: [RFC PATCH -next v3 07/10] fs: introduce FALLOC_FL_WRITE_ZEROES
 to fallocate

On 2025/4/9 18:50, Christian Brauner wrote:
> On Wed, Apr 09, 2025 at 12:35:48PM +0200, Christoph Hellwig wrote:
>> On Tue, Mar 18, 2025 at 03:35:42PM +0800, Zhang Yi wrote:
>>> Users can check the disk support of unmap write zeroes command by
>>> querying:
>>>
>>>     /sys/block/<disk>/queue/write_zeroes_unmap
>>
>> No, that is not in any way a good user interface.  Users need to be
>> able to query this on a per-file basis.
> 
> Agreed. This should get a statx attribute most likely.

Sorry for the late. Sure, I will add a statx attribute for both bdev and ext4.

Thanks,
Yi.