From: Christoph Hellwig <hch@infradead.org>
To: Matthew Wilcox <willy@infradead.org>
Cc: Christoph Hellwig <hch@infradead.org>,
"Darrick J. Wong" <djwong@kernel.org>,
linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-block@vger.kernel.org,
Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH 18/21] iomap: Convert iomap_add_to_ioend to take a folio
Date: Wed, 3 Nov 2021 08:54:50 -0700 [thread overview]
Message-ID: <YYKwyudsHOmPthUP@infradead.org> (raw)
In-Reply-To: <YYGfUuItAyTNax5V@casper.infradead.org>
On Tue, Nov 02, 2021 at 08:28:02PM +0000, Matthew Wilcox wrote:
> On Tue, Nov 02, 2021 at 12:26:42AM -0700, Christoph Hellwig wrote:
> > Looking at the code not part of the context this looks fine. But I
> > really wonder if this (and also the blocks change above) would be
> > better off being split into separate, clearly documented patches.
>
> How do these three patches look? I retained your R-b on all three since
> I figured the one you offered below was good for all of them.
Sounds good, and the patches looks good. Minor nitpicks below:
> Rename end_offset to end_pos and file_offset to pos to match the
> rest of the file. Simplify the loop by calculating nblocks
> up front instead of each time around the loop.
Might be worth mentioning why it changes the types from u64 to loff_t.
> /*
> - * Walk through the page to find areas to write back. If we run off the
> - * end of the current map or find the current map invalid, grab a new
> - * one.
> + * Walk through the folio to find areas to write back. If we
> + * run off the end of the current map or find the current map
> + * invalid, grab a new one.
No real need for reflowing the comment, it still fits just fine even
with the folio change.
> Rename end_offset to end_pos and offset_into_page to poff to match the
> rest of the file. Simplify the handling of the last page straddling
> i_size.
... by doing the EOF check purely based on the byte granularity i_size
instead of converting to a pgoff prematurely.
> + isize = i_size_read(inode);
> + end_pos = page_offset(page) + PAGE_SIZE;
> + if (end_pos - 1 >= isize) {
Wouldn't this check be more obvious as:
if (end_pos > i_size) {
next prev parent reply other threads:[~2021-11-03 15:54 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-01 20:39 [PATCH 00/21] iomap/xfs folio patches Matthew Wilcox (Oracle)
2021-11-01 20:39 ` [PATCH 01/21] fs: Remove FS_THP_SUPPORT Matthew Wilcox (Oracle)
2021-11-02 7:12 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 02/21] block: Add bio_add_folio() Matthew Wilcox (Oracle)
2021-11-01 20:51 ` Jens Axboe
2021-11-02 14:15 ` Matthew Wilcox
2021-11-02 7:12 ` Christoph Hellwig
2021-11-03 1:25 ` wangjianjian (C)
2021-11-03 2:22 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 03/21] block: Add bio_for_each_folio_all() Matthew Wilcox (Oracle)
2021-11-01 20:51 ` Jens Axboe
2021-11-02 7:13 ` Christoph Hellwig
2021-11-02 20:24 ` Matthew Wilcox
2021-11-02 22:24 ` Darrick J. Wong
2021-11-02 22:33 ` Jens Axboe
2021-11-02 22:37 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 04/21] iomap: Convert to_iomap_page to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:13 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 05/21] iomap: Convert iomap_page_create " Matthew Wilcox (Oracle)
2021-11-02 7:14 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 06/21] iomap: Convert iomap_page_release " Matthew Wilcox (Oracle)
2021-11-01 20:39 ` [PATCH 07/21] iomap: Convert iomap_releasepage to use " Matthew Wilcox (Oracle)
2021-11-02 7:14 ` Christoph Hellwig
2021-11-02 22:39 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 08/21] iomap: Add iomap_invalidate_folio Matthew Wilcox (Oracle)
2021-11-02 7:15 ` Christoph Hellwig
2021-11-02 22:36 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 09/21] iomap: Pass the iomap_page into iomap_set_range_uptodate Matthew Wilcox (Oracle)
2021-11-02 7:16 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 10/21] iomap: Convert bio completions to use folios Matthew Wilcox (Oracle)
2021-11-02 7:17 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 11/21] iomap: Use folio offsets instead of page offsets Matthew Wilcox (Oracle)
2021-11-02 7:18 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 12/21] iomap: Convert iomap_read_inline_data to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:18 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 13/21] iomap: Convert readahead and readpage to use " Matthew Wilcox (Oracle)
2021-11-02 7:20 ` Christoph Hellwig
2021-11-02 12:28 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 14/21] iomap: Convert iomap_page_mkwrite " Matthew Wilcox (Oracle)
2021-11-02 7:21 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 15/21] iomap: Convert iomap_write_begin and iomap_write_end to folios Matthew Wilcox (Oracle)
2021-11-02 0:25 ` kernel test robot
2021-11-02 7:22 ` Christoph Hellwig
2021-11-02 23:22 ` Darrick J. Wong
2021-11-03 3:15 ` Matthew Wilcox
2021-11-03 12:47 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 16/21] iomap: Convert iomap_write_end_inline to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:22 ` Christoph Hellwig
2021-11-01 20:39 ` [PATCH 17/21] iomap,xfs: Convert ->discard_page to ->discard_folio Matthew Wilcox (Oracle)
2021-11-02 7:23 ` Christoph Hellwig
2021-11-03 15:43 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 18/21] iomap: Convert iomap_add_to_ioend to take a folio Matthew Wilcox (Oracle)
2021-11-02 7:26 ` Christoph Hellwig
2021-11-02 20:28 ` Matthew Wilcox
2021-11-03 15:54 ` Christoph Hellwig [this message]
2021-11-04 3:33 ` Matthew Wilcox
2021-11-04 8:38 ` Christoph Hellwig
2021-11-04 8:40 ` Christoph Hellwig
2021-11-03 16:00 ` Darrick J. Wong
2021-11-04 3:42 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 19/21] iomap: Convert iomap_migrate_page to use folios Matthew Wilcox (Oracle)
2021-11-02 7:27 ` Christoph Hellwig
2021-11-03 16:02 ` Darrick J. Wong
2021-11-06 3:44 ` Matthew Wilcox
2021-11-01 20:39 ` [PATCH 20/21] iomap: Support multi-page folios in invalidatepage Matthew Wilcox (Oracle)
2021-11-02 7:27 ` Christoph Hellwig
2021-11-03 16:03 ` Darrick J. Wong
2021-11-01 20:39 ` [PATCH 21/21] xfs: Support multi-page folios Matthew Wilcox (Oracle)
2021-11-02 7:27 ` Christoph Hellwig
2021-11-03 16:07 ` Darrick J. Wong
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