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| author | Jens Axboe <axboe@kernel.dk> | 2019-02-27 21:13:23 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2019-03-18 17:44:48 +0100 |
| commit | 399254aaf4892113c806816f7e64cf40c804d46d (patch) | |
| tree | 319206f280d9b57c45dfa2a42e869b25270611f4 /fs/block_dev.c | |
| parent | iov_iter: add ITER_BVEC_FLAG_NO_REF flag (diff) | |
| download | linux-399254aaf4892113c806816f7e64cf40c804d46d.tar.xz linux-399254aaf4892113c806816f7e64cf40c804d46d.zip | |
block: add BIO_NO_PAGE_REF flag
If bio_iov_iter_get_pages() is called on an iov_iter that is flagged
with NO_REF, then we don't need to add a page reference for the pages
that we add.
Add BIO_NO_PAGE_REF to track this in the bio, so IO completion knows
not to drop a reference to these pages.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/block_dev.c')
| -rw-r--r-- | fs/block_dev.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/block_dev.c b/fs/block_dev.c index e9faa52bb489..78d3257435c0 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -336,12 +336,14 @@ static void blkdev_bio_end_io(struct bio *bio) if (should_dirty) { bio_check_pages_dirty(bio); } else { - struct bio_vec *bvec; - int i; - struct bvec_iter_all iter_all; + if (!bio_flagged(bio, BIO_NO_PAGE_REF)) { + struct bvec_iter_all iter_all; + struct bio_vec *bvec; + int i; - bio_for_each_segment_all(bvec, bio, i, iter_all) - put_page(bvec->bv_page); + bio_for_each_segment_all(bvec, bio, i, iter_all) + put_page(bvec->bv_page); + } bio_put(bio); } } |