From: "Darrick J. Wong" <djwong@kernel.org>
To: Miklos Szeredi <miklos@szeredi.hu>
Cc: Amir Goldstein <amir73il@gmail.com>,
linux-fsdevel <linux-fsdevel@vger.kernel.org>,
John@groves.net, bernd@bsbernd.com, joannelkoong@gmail.com,
Josef Bacik <josef@toxicpanda.com>,
linux-ext4 <linux-ext4@vger.kernel.org>,
Theodore Ts'o <tytso@mit.edu>,
Matthew Wilcox <willy@infradead.org>
Subject: Re: [RFC[RAP] V2] fuse: use fs-iomap for better performance so we can containerize ext4
Date: Mon, 30 Jun 2025 23:05:26 -0700 [thread overview]
Message-ID: <20250701060526.GH9987@frogsfrogsfrogs> (raw)
In-Reply-To: <CAJfpegui8-_J3o1QKOxGqMKOSt5O6Xw979YnnmwTF3P0yh_j+Q@mail.gmail.com>
On Mon, Jun 23, 2025 at 03:16:53PM +0200, Miklos Szeredi wrote:
> On Fri, 13 Jun 2025 at 19:37, Darrick J. Wong <djwong@kernel.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.
Are you talking about the fc->writeback_cache stuff? Yeah, that mostly
works out for fuse2fs. Though I was wondering, when does atime get
updated? fs/fuse sets S_NOATIME, so I guess it's up to the fuse server
to update it when it wants to, and a later FUSE_GETATTR can pick it up?
If so, how do fuse servers implement lazytime/relatime?
--D
> Thanks,
> Miklos
>
prev parent reply other threads:[~2025-07-01 6:05 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-21 23:58 [RFC[RAP]] fuse: use fs-iomap for better performance so we can containerize ext4 Darrick J. Wong
2025-05-22 0:01 ` [PATCHSET RFC[RAP]] fuse: allow servers to use iomap for better file IO performance Darrick J. Wong
2025-05-22 0:02 ` [PATCH 01/11] fuse: fix livelock in synchronous file put from fuseblk workers Darrick J. Wong
2025-05-29 11:08 ` Miklos Szeredi
2025-05-31 1:08 ` Darrick J. Wong
2025-06-06 13:54 ` Miklos Szeredi
2025-06-09 18:13 ` Darrick J. Wong
2025-06-09 20:29 ` Darrick J. Wong
2025-05-22 0:02 ` [PATCH 02/11] iomap: exit early when iomap_iter is called with zero length Darrick J. Wong
2025-05-22 0:03 ` [PATCH 03/11] fuse: implement the basic iomap mechanisms Darrick J. Wong
2025-05-29 22:15 ` Joanne Koong
2025-05-29 23:15 ` Joanne Koong
2025-06-03 0:13 ` Darrick J. Wong
2025-05-22 0:03 ` [PATCH 04/11] fuse: add a notification to add new iomap devices Darrick J. Wong
2025-05-22 16:46 ` Amir Goldstein
2025-05-22 17:11 ` Darrick J. Wong
2025-05-22 0:03 ` [PATCH 05/11] fuse: send FUSE_DESTROY to userspace when tearing down an iomap connection Darrick J. Wong
2025-05-22 0:04 ` [PATCH 06/11] fuse: implement basic iomap reporting such as FIEMAP and SEEK_{DATA,HOLE} Darrick J. Wong
2025-05-22 0:04 ` [PATCH 07/11] fuse: implement direct IO with iomap Darrick J. Wong
2025-05-22 0:04 ` [PATCH 08/11] fuse: implement buffered " Darrick J. Wong
2025-05-22 0:04 ` [PATCH 09/11] fuse: implement large folios for iomap pagecache files Darrick J. Wong
2025-05-22 0:05 ` [PATCH 10/11] fuse: use an unrestricted backing device with iomap pagecache io Darrick J. Wong
2025-05-22 0:05 ` [PATCH 11/11] fuse: advertise support for iomap Darrick J. Wong
2025-05-22 0:01 ` [PATCHSET RFC[RAP]] libfuse: allow servers to use iomap for better file IO performance Darrick J. Wong
2025-05-22 0:05 ` [PATCH 1/8] libfuse: add kernel gates for FUSE_IOMAP and bump libfuse api version Darrick J. Wong
2025-05-22 0:05 ` [PATCH 2/8] libfuse: add fuse commands for iomap_begin and end Darrick J. Wong
2025-05-22 0:06 ` [PATCH 3/8] libfuse: add upper level iomap commands Darrick J. Wong
2025-05-22 0:06 ` [PATCH 4/8] libfuse: add a notification to add a new device to iomap Darrick J. Wong
2025-05-22 0:06 ` [PATCH 5/8] libfuse: add iomap ioend low level handler Darrick J. Wong
2025-05-22 0:06 ` [PATCH 6/8] libfuse: add upper level iomap ioend commands Darrick J. Wong
2025-05-22 0:07 ` [PATCH 7/8] libfuse: add FUSE_IOMAP_PAGECACHE Darrick J. Wong
2025-05-22 0:07 ` [PATCH 8/8] libfuse: allow discovery of the kernel's iomap capabilities Darrick J. Wong
2025-05-22 0:02 ` [PATCHSET RFC[RAP] 2/3] libext2fs: refactoring for fuse2fs iomap support Darrick J. Wong
2025-05-22 0:08 ` [PATCH 01/10] libext2fs: always fsync the device when flushing the cache Darrick J. Wong
2025-05-22 0:08 ` [PATCH 02/10] libext2fs: always fsync the device when closing the unix IO manager Darrick J. Wong
2025-05-22 0:09 ` [PATCH 03/10] libext2fs: only fsync the unix fd if we wrote to the device Darrick J. Wong
2025-05-22 0:09 ` [PATCH 04/10] libext2fs: invalidate cached blocks when freeing them Darrick J. Wong
2025-05-22 0:09 ` [PATCH 05/10] libext2fs: add tagged block IO for better caching Darrick J. Wong
2025-05-22 0:09 ` [PATCH 06/10] libext2fs: add tagged block IO caching to the unix IO manager Darrick J. Wong
2025-05-22 0:10 ` [PATCH 07/10] libext2fs: only flush affected blocks in unix_write_byte Darrick J. Wong
2025-05-22 0:10 ` [PATCH 08/10] libext2fs: allow unix_write_byte when the write would be aligned Darrick J. Wong
2025-05-22 0:10 ` [PATCH 09/10] libext2fs: allow clients to ask to write full superblocks Darrick J. Wong
2025-05-22 0:10 ` [PATCH 10/10] libext2fs: allow callers to disallow I/O to file data blocks Darrick J. Wong
2025-05-22 0:02 ` [PATCHSET RFC[RAP] 3/3] fuse2fs: use fuse iomap data paths for better file I/O performance Darrick J. Wong
2025-05-22 0:11 ` [PATCH 01/16] fuse2fs: implement bare minimum iomap for file mapping reporting Darrick J. Wong
2025-05-22 0:11 ` [PATCH 02/16] fuse2fs: register block devices for use with iomap Darrick J. Wong
2025-05-22 0:11 ` [PATCH 03/16] fuse2fs: always use directio disk reads with fuse2fs Darrick J. Wong
2025-05-22 0:11 ` [PATCH 04/16] fuse2fs: implement directio file reads Darrick J. Wong
2025-05-22 0:12 ` [PATCH 05/16] fuse2fs: use tagged block IO for zeroing sub-block regions Darrick J. Wong
2025-05-22 0:12 ` [PATCH 06/16] fuse2fs: only flush the cache for the file under directio read Darrick J. Wong
2025-05-22 0:12 ` [PATCH 07/16] fuse2fs: add extent dump function for debugging Darrick J. Wong
2025-05-22 0:12 ` [PATCH 08/16] fuse2fs: implement direct write support Darrick J. Wong
2025-05-22 0:13 ` [PATCH 09/16] fuse2fs: turn on iomap for pagecache IO Darrick J. Wong
2025-05-22 0:13 ` [PATCH 10/16] fuse2fs: flush and invalidate the buffer cache on trim Darrick J. Wong
2025-05-22 0:13 ` [PATCH 11/16] fuse2fs: improve tracing for fallocate Darrick J. Wong
2025-05-22 0:13 ` [PATCH 12/16] fuse2fs: don't zero bytes in punch hole Darrick J. Wong
2025-05-22 0:14 ` [PATCH 13/16] fuse2fs: don't do file data block IO when iomap is enabled Darrick J. Wong
2025-05-22 0:14 ` [PATCH 14/16] fuse2fs: disable most io channel flush/invalidate in iomap pagecache mode Darrick J. Wong
2025-05-22 0:14 ` [PATCH 15/16] fuse2fs: re-enable the block device pagecache for metadata IO Darrick J. Wong
2025-05-22 0:15 ` [PATCH 16/16] fuse2fs: avoid fuseblk mode if fuse-iomap support is likely Darrick J. Wong
2025-05-22 16:24 ` [RFC[RAP]] fuse: use fs-iomap for better performance so we can containerize ext4 Amir Goldstein
2025-05-29 16:45 ` Darrick J. Wong
2025-05-29 19:41 ` Amir Goldstein
2025-06-09 22:31 ` Darrick J. Wong
2025-06-10 10:59 ` Amir Goldstein
2025-06-10 19:00 ` Darrick J. Wong
2025-06-10 19:51 ` Amir Goldstein
2025-06-11 6:00 ` Darrick J. Wong
2025-06-11 8:54 ` Amir Goldstein
2025-06-12 5:54 ` Miklos Szeredi
2025-06-13 17:44 ` Darrick J. Wong
2025-06-11 11:56 ` Theodore Ts'o
2025-06-12 3:20 ` Darrick J. Wong
2025-06-12 6:10 ` Amir Goldstein
2025-06-20 8:58 ` Allison Karlitskaya
2025-06-20 11:50 ` Bernd Schubert
2025-07-01 6:02 ` Darrick J. Wong
2025-07-01 5:58 ` Darrick J. Wong
2025-07-12 10:57 ` Amir Goldstein
2025-06-13 17:37 ` [RFC[RAP] V2] " Darrick J. Wong
2025-06-23 13:16 ` Miklos Szeredi
2025-07-01 6:05 ` Darrick J. Wong [this message]
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