linux-kernel - Re: [RFC PATCH v4 7/8] xfs: reserve blocks for truncating realtime inode

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Message-ID: <Zln4MAQmvk8BSKJM@infradead.org>
Date: Fri, 31 May 2024 09:17:52 -0700
From: Christoph Hellwig <hch@...radead.org>
To: "Darrick J. Wong" <djwong@...nel.org>
Cc: Christoph Hellwig <hch@...radead.org>,
	Zhang Yi <yi.zhang@...weicloud.com>, linux-xfs@...r.kernel.org,
	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	brauner@...nel.org, david@...morbit.com, chandanbabu@...nel.org,
	jack@...e.cz, willy@...radead.org, yi.zhang@...wei.com,
	chengzhihao1@...wei.com, yukuai3@...wei.com
Subject: Re: [RFC PATCH v4 7/8] xfs: reserve blocks for truncating realtime
 inode

On Fri, May 31, 2024 at 08:29:22AM -0700, Darrick J. Wong wrote:
> > 
> > Sorry, it was meant to say for the data device.  My whole journey
> > to check if this could get called for the attr fork twisted my mind.
> 
> I really hope not -- all writes to the attr fork have known sizes at
> syscall time, and appending doesn't even make sense.

It's obviously not.  I just had to go out and actually read the code
before commenting.