ext4: Convert data=journal writeback to use ext4_writepages()

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Add support for writeback of journalled data directly into
ext4_writepages() instead of offloading it to write_cache_pages(). This
actually significantly simplifies the code and reduces code duplication.
For checkpointing of committed data we can use ext4_writepages()
rightaway the same way as writeback of ordered data uses it on
transaction commit. For journalling of dirty mapped pages, we need to
add a special case to mpage_prepare_extent_to_map() to add all page
buffers to the journal.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Link: https://lore.kernel.org/r/20230228051319.4085470-8-tytso@mit.edu

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Jan Kara 2023-02-28 00:13:19 -05:00 • committed by Theodore Ts'o

parent d8be7607de

commit 3f079114bf

2 changed files with 91 additions and 257 deletions

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341

fs/ext4/inode.c

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7

include/trace/events/ext4.h

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