Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio

[PATCH v2 00/28] iomap/xfs folio patches · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio() · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio() · Christoph Hellwig <hch@infradead.org> · 2021-11-09
Re: [PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio() · Matthew Wilcox <willy@infradead.org> · 2021-11-15
Re: [PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio() · Christoph Hellwig <hch@infradead.org> · 2021-11-16
Re: [PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio() · Matthew Wilcox <willy@infradead.org> · 2021-11-16
Re: [PATCH v2 01/28] csky,sparc: Declare flush_dcache_folio() · Geert Uytterhoeven <geert@linux-m68k.org> · 2021-11-17
[PATCH v2 02/28] mm: Add functions to zero portions of a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio · Christoph Hellwig <hch@infradead.org> · 2021-11-09
Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio · Matthew Wilcox <willy@infradead.org> · 2021-11-17
Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio · Matthew Wilcox <willy@infradead.org> · 2021-11-18
Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-18
Re: [PATCH v2 02/28] mm: Add functions to zero portions of a folio · Matthew Wilcox <willy@infradead.org> · 2021-11-18
[PATCH v2 03/28] fs: Remove FS_THP_SUPPORT · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 03/28] fs: Remove FS_THP_SUPPORT · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
[PATCH v2 04/28] fs: Rename AS_THP_SUPPORT and mapping_thp_support · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 04/28] fs: Rename AS_THP_SUPPORT and mapping_thp_support · Christoph Hellwig <hch@infradead.org> · 2021-11-09
Re: [PATCH v2 04/28] fs: Rename AS_THP_SUPPORT and mapping_thp_support · Matthew Wilcox <willy@infradead.org> · 2021-11-15
Re: [PATCH v2 04/28] fs: Rename AS_THP_SUPPORT and mapping_thp_support · Christoph Hellwig <hch@infradead.org> · 2021-11-16
[PATCH v2 05/28] block: Add bio_add_folio() · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 05/28] block: Add bio_add_folio() · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
[PATCH v2 06/28] block: Add bio_for_each_folio_all() · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 06/28] block: Add bio_for_each_folio_all() · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
[PATCH v2 07/28] fs/buffer: Convert __block_write_begin_int() to take a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 07/28] fs/buffer: Convert __block_write_begin_int() to take a folio · Christoph Hellwig <hch@infradead.org> · 2021-11-09
Re: [PATCH v2 07/28] fs/buffer: Convert __block_write_begin_int() to take a folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
[PATCH v2 08/28] iomap: Convert to_iomap_page to take a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 09/28] iomap: Convert iomap_page_create to take a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 10/28] iomap: Convert iomap_page_release to take a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 11/28] iomap: Convert iomap_releasepage to use a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 12/28] iomap: Add iomap_invalidate_folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 12/28] iomap: Add iomap_invalidate_folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
[PATCH v2 13/28] iomap: Pass the iomap_page into iomap_set_range_uptodate · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 14/28] iomap: Convert bio completions to use folios · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 15/28] iomap: Use folio offsets instead of page offsets · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 16/28] iomap: Convert iomap_read_inline_data to take a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 17/28] iomap: Convert readahead and readpage to use a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 17/28] iomap: Convert readahead and readpage to use a folio · Christoph Hellwig <hch@infradead.org> · 2021-11-09
[PATCH v2 18/28] iomap: Convert iomap_page_mkwrite to use a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · Christoph Hellwig <hch@infradead.org> · 2021-11-09
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · Matthew Wilcox <willy@infradead.org> · 2021-11-17
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · Matthew Wilcox <willy@infradead.org> · 2021-12-09
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · Matthew Wilcox <willy@infradead.org> · 2021-12-10
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · Christoph Hellwig <hch@infradead.org> · 2021-12-13
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · Matthew Wilcox <willy@infradead.org> · 2021-12-13
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-12-16
Re: [PATCH v2 19/28] iomap: Convert __iomap_zero_iter to use a folio · Matthew Wilcox <willy@infradead.org> · 2021-12-16
[PATCH v2 20/28] iomap: Convert iomap_write_begin() and iomap_write_end() to folios · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 20/28] iomap: Convert iomap_write_begin() and iomap_write_end() to folios · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
Re: [PATCH v2 20/28] iomap: Convert iomap_write_begin() and iomap_write_end() to folios · Matthew Wilcox <willy@infradead.org> · 2021-11-17
Re: [PATCH v2 20/28] iomap: Convert iomap_write_begin() and iomap_write_end() to folios · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
[PATCH v2 21/28] iomap: Convert iomap_write_end_inline to take a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 22/28] iomap,xfs: Convert ->discard_page to ->discard_folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 23/28] iomap: Simplify iomap_writepage_map() · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 24/28] iomap: Simplify iomap_do_writepage() · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 25/28] iomap: Convert iomap_add_to_ioend() to take a folio · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
Re: [PATCH v2 25/28] iomap: Convert iomap_add_to_ioend() to take a folio · "Darrick J. Wong" <djwong@kernel.org> · 2021-11-17
[PATCH v2 26/28] iomap: Convert iomap_migrate_page() to use folios · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 27/28] iomap: Support multi-page folios in invalidatepage · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08
[PATCH v2 28/28] xfs: Support multi-page folios · "Matthew Wilcox (Oracle)" <willy@infradead.org> · 2021-11-08

From: Christoph Hellwig <hch@infradead.org>
Date: 2021-11-09 08:47:32
Also in: linux-fsdevel, linux-xfs, lkml

On Mon, Nov 08, 2021 at 04:05:42AM +0000, Matthew Wilcox (Oracle) wrote:

The zero iterator can work in folio-sized chunks instead of page-sized
chunks.  This will save a lot of page cache lookups if the file is cached
in multi-page folios.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>

but it will clash with my just sent series that decouples DAX
zeroing from buffered I/O zeroing and folds __iomap_zero_iter into
the caller.

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