linux-kernel - Re: [RFC PATCH v4 07/11] fs: statx add write zeroes unmap attribute

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Message-ID: <20250506121012.GA21705@lst.de>
Date: Tue, 6 May 2025 14:10:12 +0200
From: Christoph Hellwig <hch@....de>
To: Zhang Yi <yi.zhang@...weicloud.com>, dhowells@...hat.com,
	brauner@...nel.org
Cc: Christoph Hellwig <hch@....de>, "Darrick J. Wong" <djwong@...nel.org>,
	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, 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 v4 07/11] fs: statx add write zeroes unmap attribute

On Tue, May 06, 2025 at 07:25:06PM +0800, Zhang Yi wrote:
> +       if (request_mask & STATX_WRITE_ZEROES_UNMAP &&
> +           bdev_write_zeroes_unmap(bdev))
> +               stat->result_mask |= STATX_WRITE_ZEROES_UNMAP;

That would be my expectation.  But then again this area seems to
confuse me a lot, so maybe we'll get Christian or Dave to chim in.