linux-ext4 - Re: [RFC[RAP] V2] fuse: use fs-iomap for better performance so we can containerize ext4

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Message-ID: <CAJfpegui8-_J3o1QKOxGqMKOSt5O6Xw979YnnmwTF3P0yh_j+Q@mail.gmail.com>
Date: Mon, 23 Jun 2025 15:16:53 +0200
From: Miklos Szeredi <miklos@...redi.hu>
To: "Darrick J. Wong" <djwong@...nel.org>
Cc: Amir Goldstein <amir73il@...il.com>, linux-fsdevel <linux-fsdevel@...r.kernel.org>, John@...ves.net, 
	bernd@...ernd.com, joannelkoong@...il.com, Josef Bacik <josef@...icpanda.com>, 
	linux-ext4 <linux-ext4@...r.kernel.org>, "Theodore Ts'o" <tytso@....edu>, 
	Matthew Wilcox <willy@...radead.org>
Subject: Re: [RFC[RAP] V2] fuse: use fs-iomap for better performance so we can
 containerize ext4

On Fri, 13 Jun 2025 at 19:37, Darrick J. Wong <djwong@...nel.org> wrote:

> Top of that list is timestamps and file attributes, because fuse no
> longer calls the fuse server for file writes.  As a result, the kernel
> inode always has the most uptodate versions of the some file attributes
> (i_size, timestamps, mode) and just want to send FUSE_SETATTR whenever
> the dirty inode gets flushed.

This is already the case for cached writes, no new code should be needed.

Thanks,
Miklos