linux-ext4 - Re: [RFC PATCH -next v3 07/10] fs: introduce FALLOC_FL_WRITE

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Message-ID: <20250409-ausdauer-weingut-4025b274ee63@brauner>
Date: Wed, 9 Apr 2025 12:50:49 +0200
From: Christian Brauner <brauner@...nel.org>
To: Christoph Hellwig <hch@....de>
Cc: Zhang Yi <yi.zhang@...weicloud.com>, 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 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.