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ext4: move the calculation of wbc->nr_to_write to mpage_folio_done()

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mpage_folio_done() should be a more appropriate place than
mpage_submit_folio() for updating the wbc->nr_to_write after we have
submitted a fully mapped folio. Preparing to make mpage_submit_folio()
allows to submit partially mapped folio that is still under processing.

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Baokun Li <libaokun1@huawei.com>
Link: https://patch.msgid.link/20250707140814.542883-3-yi.zhang@huaweicloud.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Zhang Yi
2025-07-13 23:41:51 -04:00
committed by Theodore Ts'o
parent 1bfe6354e0
commit f922c8c246
1 changed files with 1 additions and 2 deletions
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fs/ext4/inode.c
+1 -2
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@@ -2024,6 +2024,7 @@ int ext4_da_get_block_prep(struct inode *inode, sector_t iblock,
static void mpage_folio_done(struct mpage_da_data *mpd, struct folio *folio)
{
mpd->start_pos += folio_size(folio);
mpd->wbc->nr_to_write -= folio_nr_pages(folio);
folio_unlock(folio);
}
@@ -2054,8 +2055,6 @@ static int mpage_submit_folio(struct mpage_da_data *mpd, struct folio *folio)
!ext4_verity_in_progress(mpd->inode))
len = size & (len - 1);
err = ext4_bio_write_folio(&mpd->io_submit, folio, len);
if (!err)
mpd->wbc->nr_to_write -= folio_nr_pages(folio);
return err;
}