From: Matthew Wilcox <willy@infradead.org>
To: Ritesh Harjani <ritesh.list@gmail.com>
Cc: Theodore Tso <tytso@mit.edu>,
Andreas Dilger <adilger.kernel@dilger.ca>,
linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: Re: [PATCH 04/31] ext4: Convert ext4_finish_bio() to use folios
Date: Thu, 23 Mar 2023 03:26:43 +0000 [thread overview]
Message-ID: <ZBvG8xbGHwQ+PPQa@casper.infradead.org> (raw)
In-Reply-To: <87ttyy1bz4.fsf@doe.com>
On Mon, Mar 06, 2023 at 02:40:55PM +0530, Ritesh Harjani wrote:
> "Matthew Wilcox (Oracle)" <willy@infradead.org> writes:
>
> > Prepare ext4 to support large folios in the page writeback path.
>
> Sure. I am guessing for ext4 to completely support large folio
> requires more work like fscrypt bounce page handling doesn't
> yet support folios right?
>
> Could you please give a little background on what all would be required
> to add large folio support in ext4 buffered I/O path?
> (I mean ofcourse other than saying move ext4 to iomap ;))
>
> What I was interested in was, what other components in particular for
> e.g. fscrypt, fsverity, ext4's xyz component needs large folio support?
>
> And how should one go about in adding this support? So can we move
> ext4's read path to have large folio support to get started?
> Have you already identified what all is missing from this path to
> convert it?
Honestly, I don't know what else needs to be done beyond this patch
series. I can point at some stuff and say "This doesn't work", but in
general, you have to just enable it and see what breaks. A lot of the
buffer_head code is not large-folio safe right now, so that's somewhere
to go and look. Or maybe we "just" convert to iomap, and never bother
fixing the bufferhead code for large folios.
> > Also set the actual error in the mapping, not just -EIO.
>
> Right. I looked at the history and I think it always just had EIO.
> I think setting the actual err in mapping_set_error() is the right thing
> to do here.
>
> >
> > Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
>
> w.r.t this patch series. I reviewed the mechanical changes & error paths
> which converts ext4 ext4_finish_bio() to use folio.
>
> The changes looks good to me from that perspective. Feel free to add -
> Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Thanks!
next prev parent reply other threads:[~2023-03-23 3:26 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-26 20:23 [PATCH 00/31] Convert most of ext4 to folios Matthew Wilcox (Oracle)
2023-01-26 20:23 ` [PATCH 01/31] fs: Add FGP_WRITEBEGIN Matthew Wilcox (Oracle)
2023-03-05 8:53 ` Ritesh Harjani
2023-03-14 22:00 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 02/31] fscrypt: Add some folio helper functions Matthew Wilcox (Oracle)
2023-01-27 3:02 ` Eric Biggers
2023-01-27 16:13 ` Matthew Wilcox
2023-01-27 16:21 ` Eric Biggers
2023-01-27 16:37 ` Matthew Wilcox
2023-03-14 22:05 ` Theodore Ts'o
2023-03-14 23:12 ` Eric Biggers
2023-03-15 2:53 ` Theodore Ts'o
2023-03-05 9:06 ` Ritesh Harjani
2023-01-26 20:23 ` [PATCH 03/31] ext4: Convert ext4_bio_write_page() to use a folio Matthew Wilcox (Oracle)
2023-01-28 16:53 ` kernel test robot
2023-01-28 19:07 ` kernel test robot
2023-03-05 11:18 ` Ritesh Harjani
2023-03-14 22:07 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 04/31] ext4: Convert ext4_finish_bio() to use folios Matthew Wilcox (Oracle)
2023-03-06 9:10 ` Ritesh Harjani
2023-03-23 3:26 ` Matthew Wilcox [this message]
2023-03-23 14:51 ` Darrick J. Wong
2023-03-23 15:30 ` Matthew Wilcox
2023-03-27 0:58 ` Christoph Hellwig
2023-03-27 0:57 ` Christoph Hellwig
2023-03-14 22:08 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 05/31] ext4: Convert ext4_writepage() to use a folio Matthew Wilcox (Oracle)
2023-03-06 18:45 ` Ritesh Harjani
2023-03-14 22:26 ` Theodore Ts'o
2023-03-23 3:29 ` Matthew Wilcox
2023-01-26 20:23 ` [PATCH 06/31] ext4: Turn mpage_process_page() into mpage_process_folio() Matthew Wilcox (Oracle)
2023-03-14 22:27 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 07/31] ext4: Convert mpage_submit_page() to mpage_submit_folio() Matthew Wilcox (Oracle)
2023-03-14 22:28 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 08/31] ext4: Convert ext4_bio_write_page() to ext4_bio_write_folio() Matthew Wilcox (Oracle)
2023-03-14 22:31 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 09/31] ext4: Convert ext4_readpage_inline() to take a folio Matthew Wilcox (Oracle)
2023-03-14 22:31 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 10/31] ext4: Convert ext4_convert_inline_data_to_extent() to use " Matthew Wilcox (Oracle)
2023-03-14 22:36 ` Theodore Ts'o
2023-03-23 17:14 ` Matthew Wilcox
2023-01-26 20:23 ` [PATCH 11/31] ext4: Convert ext4_try_to_write_inline_data() " Matthew Wilcox (Oracle)
2023-03-14 22:37 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 12/31] ext4: Convert ext4_da_convert_inline_data_to_extent() " Matthew Wilcox (Oracle)
2023-01-26 20:23 ` [PATCH 13/31] ext4: Convert ext4_da_write_inline_data_begin() " Matthew Wilcox (Oracle)
2023-01-26 20:23 ` [PATCH 14/31] ext4: Convert ext4_read_inline_page() to ext4_read_inline_folio() Matthew Wilcox (Oracle)
2023-03-14 22:38 ` Theodore Ts'o
2023-01-26 20:23 ` [PATCH 15/31] ext4: Convert ext4_write_inline_data_end() to use a folio Matthew Wilcox (Oracle)
2023-03-14 22:39 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 16/31] ext4: Convert ext4_write_begin() " Matthew Wilcox (Oracle)
2023-03-14 22:40 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 17/31] ext4: Convert ext4_write_end() " Matthew Wilcox (Oracle)
2023-03-14 22:41 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 18/31] ext4: Use a folio in ext4_journalled_write_end() Matthew Wilcox (Oracle)
2023-03-14 22:41 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 19/31] ext4: Convert ext4_journalled_zero_new_buffers() to use a folio Matthew Wilcox (Oracle)
2023-03-14 22:46 ` Theodore Ts'o
2023-03-24 4:15 ` Matthew Wilcox
2023-01-26 20:24 ` [PATCH 20/31] ext4: Convert __ext4_block_zero_page_range() " Matthew Wilcox (Oracle)
2023-03-05 12:26 ` Ritesh Harjani
2023-01-26 20:24 ` [PATCH 21/31] ext4: Convert __ext4_journalled_writepage() to take " Matthew Wilcox (Oracle)
2023-03-14 22:47 ` Theodore Ts'o
2023-03-24 4:55 ` Matthew Wilcox
2023-01-26 20:24 ` [PATCH 22/31] ext4: Convert ext4_page_nomap_can_writeout() " Matthew Wilcox (Oracle)
2023-03-14 22:50 ` Theodore Ts'o
2023-01-26 20:24 ` [PATCH 23/31] ext4: Use a folio in ext4_da_write_begin() Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 24/31] ext4: Convert ext4_mpage_readpages() to work on folios Matthew Wilcox (Oracle)
2023-01-27 4:15 ` Eric Biggers
2023-01-27 16:08 ` Matthew Wilcox
2023-03-05 11:26 ` Ritesh Harjani
2023-01-26 20:24 ` [PATCH 25/31] ext4: Convert ext4_block_write_begin() to take a folio Matthew Wilcox (Oracle)
2023-03-06 6:51 ` Ritesh Harjani
2023-03-06 8:27 ` Matthew Wilcox
2023-03-06 15:21 ` Ritesh Harjani
2023-03-15 4:40 ` Matthew Wilcox
2023-03-15 14:57 ` Ritesh Harjani
2023-01-26 20:24 ` [PATCH 26/31] ext4: Convert ext4_writepage() " Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 27/31] ext4: Use a folio in ext4_page_mkwrite() Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 28/31] ext4: Use a folio iterator in __read_end_io() Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 29/31] ext4: Convert mext_page_mkuptodate() to take a folio Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 30/31] ext4: Convert pagecache_read() to use " Matthew Wilcox (Oracle)
2023-01-26 20:24 ` [PATCH 31/31] ext4: Use a folio in ext4_read_merkle_tree_page Matthew Wilcox (Oracle)
2023-03-15 17:57 ` [PATCH 00/31] Convert most of ext4 to folios Theodore Ts'o
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