diff options
| author | Jens Axboe <jens.axboe@oracle.com> | 2007-06-19 09:09:27 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2007-07-10 08:03:32 +0200 |
| commit | 32eef964110985c5845472e07fa0a18838a970c4 (patch) | |
| tree | 69a96d9757c72800e3d6479927e00316a4483361 /block/ll_rw_blk.c | |
| parent | 7deeed13170e634adc4552ff94588d6301a3da83 (diff) | |
| download | lwn-32eef964110985c5845472e07fa0a18838a970c4.tar.gz lwn-32eef964110985c5845472e07fa0a18838a970c4.zip | |
blk_hw_contig_segment(): bad segment size checks
Two bugs in there:
- The virt oversize check should use the current bio hardware back
size and the next bio front size, not the same bio. Spotted by
Neil Brown.
- The segment size check should add hw front sizes, not total bio
sizes. Spotted by James Bottomley
Acked-by: James Bottomley <James.Bottomley@SteelEye.com>
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/ll_rw_blk.c')
| -rw-r--r-- | block/ll_rw_blk.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c index c99b46354859..3e7801e49033 100644 --- a/block/ll_rw_blk.c +++ b/block/ll_rw_blk.c @@ -1304,9 +1304,9 @@ static int blk_hw_contig_segment(request_queue_t *q, struct bio *bio, if (unlikely(!bio_flagged(nxt, BIO_SEG_VALID))) blk_recount_segments(q, nxt); if (!BIOVEC_VIRT_MERGEABLE(__BVEC_END(bio), __BVEC_START(nxt)) || - BIOVEC_VIRT_OVERSIZE(bio->bi_hw_front_size + bio->bi_hw_back_size)) + BIOVEC_VIRT_OVERSIZE(bio->bi_hw_back_size + nxt->bi_hw_front_size)) return 0; - if (bio->bi_size + nxt->bi_size > q->max_segment_size) + if (bio->bi_hw_back_size + nxt->bi_hw_front_size > q->max_segment_size) return 0; return 1; |