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| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2024-02-15 07:36:43 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-02-23 17:48:36 -0800 |
| commit | 751e0d559c62a87dc828af22c3c58dc078c734e3 (patch) | |
| tree | 532b088cc1f4e64212b9ffdb389e35efc2a254d7 /include/linux/writeback.h | |
| parent | b1793929b7dc17842a5e4377796b005d3efd61bc (diff) | |
| download | linux-751e0d559c62a87dc828af22c3c58dc078c734e3.tar.gz linux-751e0d559c62a87dc828af22c3c58dc078c734e3.tar.bz2 linux-751e0d559c62a87dc828af22c3c58dc078c734e3.zip | |
writeback: factor writeback_get_batch() out of write_cache_pages()
This simple helper will be the basis of the writeback iterator. To make
this work, we need to remember the current index and end positions in
writeback_control.
[hch@lst.de: heavily rebased, add helpers to get the tag and end index, don't keep the end index in struct writeback_control]
Link: https://lkml.kernel.org/r/20240215063649.2164017-9-hch@lst.de
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Acked-by: Dave Chinner <dchinner@redhat.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/writeback.h')
| -rw-r--r-- | include/linux/writeback.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 4b8cf9e4810b..f67b3ea866a0 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -11,6 +11,7 @@ #include <linux/flex_proportions.h> #include <linux/backing-dev-defs.h> #include <linux/blk_types.h> +#include <linux/pagevec.h> struct bio; @@ -40,6 +41,7 @@ enum writeback_sync_modes { * in a manner such that unspecified fields are set to zero. */ struct writeback_control { + /* public fields that can be set and/or consumed by the caller: */ long nr_to_write; /* Write this many pages, and decrement this for each page written */ long pages_skipped; /* Pages which were not written */ @@ -77,6 +79,10 @@ struct writeback_control { */ struct swap_iocb **swap_plug; + /* internal fields used by the ->writepages implementation: */ + struct folio_batch fbatch; + pgoff_t index; + #ifdef CONFIG_CGROUP_WRITEBACK struct bdi_writeback *wb; /* wb this writeback is issued under */ struct inode *inode; /* inode being written out */ |