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| author | Keith Busch <kbusch@kernel.org> | 2022-06-10 12:58:26 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-06-27 06:29:11 -0600 |
| commit | 9cfe3ddecdc556ab1d1693b29e8a26ba80953ccc (patch) | |
| tree | 6442d3c8a80f4584e5fa7397b48acde380a3fb3f /block/bounce.c | |
| parent | 67927d22015060967122facc8cfeaad8012e8808 (diff) | |
| download | linux-stable-9cfe3ddecdc556ab1d1693b29e8a26ba80953ccc.tar.gz linux-stable-9cfe3ddecdc556ab1d1693b29e8a26ba80953ccc.tar.bz2 linux-stable-9cfe3ddecdc556ab1d1693b29e8a26ba80953ccc.zip | |
block/bounce: count bytes instead of sectors
Individual bv_len's may not be a sector size.
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Pankaj Raghav <p.raghav@samsung.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220610195830.3574005-8-kbusch@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/bounce.c')
| -rw-r--r-- | block/bounce.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/block/bounce.c b/block/bounce.c index 8f7b6fe3b4db..c8f487af7be3 100644 --- a/block/bounce.c +++ b/block/bounce.c @@ -205,19 +205,26 @@ void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig) int rw = bio_data_dir(*bio_orig); struct bio_vec *to, from; struct bvec_iter iter; - unsigned i = 0; + unsigned i = 0, bytes = 0; bool bounce = false; - int sectors = 0; + int sectors; bio_for_each_segment(from, *bio_orig, iter) { if (i++ < BIO_MAX_VECS) - sectors += from.bv_len >> 9; + bytes += from.bv_len; if (PageHighMem(from.bv_page)) bounce = true; } if (!bounce) return; + /* + * Individual bvecs might not be logical block aligned. Round down + * the split size so that each bio is properly block size aligned, + * even if we do not use the full hardware limits. + */ + sectors = ALIGN_DOWN(bytes, queue_logical_block_size(q)) >> + SECTOR_SHIFT; if (sectors < bio_sectors(*bio_orig)) { bio = bio_split(*bio_orig, sectors, GFP_NOIO, &bounce_bio_split); bio_chain(bio, *bio_orig); |