diff options
Diffstat (limited to 'fs/bcachefs/fs-io-buffered.c')
| -rw-r--r-- | fs/bcachefs/fs-io-buffered.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/fs/bcachefs/fs-io-buffered.c b/fs/bcachefs/fs-io-buffered.c index 58ccc7b91ac7..52f0e7acda3d 100644 --- a/fs/bcachefs/fs-io-buffered.c +++ b/fs/bcachefs/fs-io-buffered.c @@ -389,6 +389,21 @@ static inline struct bch_writepage_state bch_writepage_state_init(struct bch_fs return ret; } +/* + * Determine when a writepage io is full. We have to limit writepage bios to a + * single page per bvec (i.e. 1MB with 4k pages) because that is the limit to + * what the bounce path in bch2_write_extent() can handle. In theory we could + * loosen this restriction for non-bounce I/O, but we don't have that context + * here. Ideally, we can up this limit and make it configurable in the future + * when the bounce path can be enhanced to accommodate larger source bios. + */ +static inline bool bch_io_full(struct bch_writepage_io *io, unsigned len) +{ + struct bio *bio = &io->op.wbio.bio; + return bio_full(bio, len) || + (bio->bi_iter.bi_size + len > BIO_MAX_VECS * PAGE_SIZE); +} + static void bch2_writepage_io_done(struct bch_write_op *op) { struct bch_writepage_io *io = @@ -606,9 +621,7 @@ do_io: if (w->io && (w->io->op.res.nr_replicas != nr_replicas_this_write || - bio_full(&w->io->op.wbio.bio, sectors << 9) || - w->io->op.wbio.bio.bi_iter.bi_size + (sectors << 9) >= - (BIO_MAX_VECS * PAGE_SIZE) || + bch_io_full(w->io, sectors << 9) || bio_end_sector(&w->io->op.wbio.bio) != sector)) bch2_writepage_do_io(w); |