linux-kernel - Re: [PATCH 4/4] xfs: fallback to buffered I/O for direct I/O when stable writes are required

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Message-ID: <20251030065504.GB13617@lst.de>
Date: Thu, 30 Oct 2025 07:55:04 +0100
From: Christoph Hellwig <hch@....de>
To: Qu Wenruo <wqu@...e.com>
Cc: Christoph Hellwig <hch@....de>, Qu Wenruo <quwenruo.btrfs@....com>,
	"Darrick J. Wong" <djwong@...nel.org>,
	Carlos Maiolino <cem@...nel.org>,
	Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-raid@...r.kernel.org,
	linux-block@...r.kernel.org, linux-btrfs@...r.kernel.org
Subject: Re: [PATCH 4/4] xfs: fallback to buffered I/O for direct I/O when
 stable writes are required

On Thu, Oct 30, 2025 at 05:23:32PM +1030, Qu Wenruo wrote:
>> So what is your application going to do if the open fails?
>
> If it can not accept buffered fallback, error out.

Why would it not be able to accept that?