ext4: move keep_towrite handling to ext4_bio_write_page()

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When we are writing back page but we cannot for some reason write all
its buffers (e.g. because we cannot allocate blocks in current context) we
have to keep TOWRITE tag set in the mapping as otherwise racing
WB_SYNC_ALL writeback that could write these buffers can skip the page
and result in data loss.  We will need this logic for writeback during
transaction commit so move the logic from ext4_writepage() to
ext4_bio_write_page().

Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20221207112722.22220-2-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

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This commit is contained in:

Jan Kara 2022-12-07 12:27:05 +01:00 • committed by Theodore Ts'o

parent 04e568a3b3

commit dff4ac75ee

3 changed files with 24 additions and 21 deletions

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3

fs/ext4/ext4.h

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6

fs/ext4/inode.c

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36

fs/ext4/page-io.c

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