From: Christoph Hellwig <hch@infradead.org>
To: "Darrick J. Wong" <djwong@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>,
Jens Axboe <axboe@kernel.dk>,
linux-mm@kvack.org, linux-fsdevel@vger.kernel.org,
hannes@cmpxchg.org, clm@meta.com, linux-kernel@vger.kernel.org,
willy@infradead.org, kirill@shutemov.name,
linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org,
linux-xfs@vger.kernel.org, bfoster@redhat.com
Subject: Re: [PATCH 14/17] iomap: make buffered writes work with RWF_UNCACHED
Date: Wed, 11 Dec 2024 22:31:09 -0800 [thread overview]
Message-ID: <Z1qDLYPwfaYdoeXW@infradead.org> (raw)
In-Reply-To: <20241212062641.GD6678@frogsfrogsfrogs>
On Wed, Dec 11, 2024 at 10:26:41PM -0800, Darrick J. Wong wrote:
> > iomap.flags and the IOMAP_F_* namespace is used to communicate flags
> > from the file system to the iomap core, so this looks wrong.
>
> Not entirely true -- IOMAP_F_SIZE_CHANGED is used to communicate state
> from iomap to gfs2, and IOMAP_F_STALE is set/checked only by the iomap
> core. iomap.h even says as much.
Indeed, some of the non-initial additions already broke this. And now
that you mentioned it I ran into that before because it was in the way
of some further constifycation I attempted in fs/iomap/.
> Though given that there's a 4-byte gap in struct iomap between flags and
> the bdev pointer (at least on 64-bit) maybe we should make a separate
> field for these iomap state bits?
Probably. Preferably in a way that isn't too painful for Jens, though.
next prev parent reply other threads:[~2024-12-12 6:31 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-11-14 15:25 [PATCHSET v5 0/17] Uncached buffered IO Jens Axboe
2024-11-14 15:25 ` [PATCH 01/17] mm/filemap: change filemap_create_folio() to take a struct kiocb Jens Axboe
2024-11-14 15:25 ` [PATCH 02/17] mm/readahead: add folio allocation helper Jens Axboe
2024-11-14 15:25 ` [PATCH 03/17] mm: add PG_uncached page flag Jens Axboe
2024-11-14 15:25 ` [PATCH 04/17] mm/readahead: add readahead_control->uncached member Jens Axboe
2024-11-14 15:25 ` [PATCH 05/17] mm/filemap: use page_cache_sync_ra() to kick off read-ahead Jens Axboe
2024-11-14 15:25 ` [PATCH 06/17] mm/truncate: add folio_unmap_invalidate() helper Jens Axboe
2024-11-14 15:25 ` [PATCH 07/17] fs: add RWF_UNCACHED iocb and FOP_UNCACHED file_operations flag Jens Axboe
2024-11-14 15:25 ` [PATCH 08/17] mm/filemap: add read support for RWF_UNCACHED Jens Axboe
2024-11-15 8:49 ` Kirill A. Shutemov
2024-11-15 15:01 ` Jens Axboe
2024-11-14 15:25 ` [PATCH 09/17] mm/filemap: drop uncached pages when writeback completes Jens Axboe
2024-11-14 15:25 ` [PATCH 10/17] mm/filemap: make buffered writes work with RWF_UNCACHED Jens Axboe
2024-11-18 8:42 ` Baokun Li
2024-11-18 14:49 ` Jens Axboe
2024-11-14 15:25 ` [PATCH 11/17] mm/filemap: add filemap_fdatawrite_range_kick() helper Jens Axboe
2024-11-14 15:25 ` [PATCH 12/17] mm: add FGP_UNCACHED folio creation flag Jens Axboe
2024-11-14 15:25 ` [PATCH 13/17] ext4: add RWF_UNCACHED write support Jens Axboe
2024-11-14 15:25 ` [PATCH 14/17] iomap: make buffered writes work with RWF_UNCACHED Jens Axboe
2024-12-12 5:50 ` Christoph Hellwig
2024-12-12 6:26 ` Darrick J. Wong
2024-12-12 6:31 ` Christoph Hellwig [this message]
2024-11-14 15:25 ` [PATCH 15/17] xfs: punt uncached write completions to the completion wq Jens Axboe
2024-11-14 15:25 ` [PATCH 16/17] xfs: flag as supporting FOP_UNCACHED Jens Axboe
2024-11-14 15:25 ` [PATCH 17/17] btrfs: add support for uncached writes Jens Axboe
2024-11-15 4:01 ` [PATCHSET v5 0/17] Uncached buffered IO Julian Sun
2024-11-15 15:06 ` Jens Axboe
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Z1qDLYPwfaYdoeXW@infradead.org \
--to=hch@infradead.org \
--cc=axboe@kernel.dk \
--cc=bfoster@redhat.com \
--cc=clm@meta.com \
--cc=djwong@kernel.org \
--cc=hannes@cmpxchg.org \
--cc=kirill@shutemov.name \
--cc=linux-btrfs@vger.kernel.org \
--cc=linux-ext4@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-xfs@vger.kernel.org \
--cc=willy@infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.