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| author | Anuj Gupta <anuj20.g@samsung.com> | 2023-05-23 14:17:09 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-06-05 10:26:21 +0300 |
| commit | efc8ec1636fa962acf709741fce1e4d0a974e70a (patch) | |
| tree | e7cb68fc7852b46c493fc68bfffb057ca5db07bc /block | |
| parent | 5d08604754e843bad0eeb6ea2dd03ca4a2278752 (diff) | |
| download | linux-efc8ec1636fa962acf709741fce1e4d0a974e70a.tar.xz | |
block: fix bio-cache for passthru IO
commit 46930b7cc7727271c9c27aac1fdc97a8645e2d00 upstream.
commit <8af870aa5b847> ("block: enable bio caching use for passthru IO")
introduced bio-cache for passthru IO. In case when nr_vecs are greater
than BIO_INLINE_VECS, bio and bvecs are allocated from mempool (instead
of percpu cache) and REQ_ALLOC_CACHE is cleared. This causes the side
effect of not freeing bio/bvecs into mempool on completion.
This patch lets the passthru IO fallback to allocation using bio_kmalloc
when nr_vecs are greater than BIO_INLINE_VECS. The corresponding bio
is freed during call to blk_mq_map_bio_put during completion.
Cc: stable@vger.kernel.org # 6.1
fixes <8af870aa5b847> ("block: enable bio caching use for passthru IO")
Signed-off-by: Anuj Gupta <anuj20.g@samsung.com>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Link: https://lore.kernel.org/r/20230523111709.145676-1-anuj20.g@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-map.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-map.c b/block/blk-map.c index 34735626b00f..66da9e2b19ab 100644 --- a/block/blk-map.c +++ b/block/blk-map.c @@ -246,7 +246,7 @@ static struct bio *blk_rq_map_bio_alloc(struct request *rq, { struct bio *bio; - if (rq->cmd_flags & REQ_POLLED) { + if (rq->cmd_flags & REQ_POLLED && (nr_vecs <= BIO_INLINE_VECS)) { blk_opf_t opf = rq->cmd_flags | REQ_ALLOC_CACHE; bio = bio_alloc_bioset(NULL, nr_vecs, opf, gfp_mask, |