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authorJohannes Thumshirn <jthumshirn@suse.de>2018-11-07 14:58:14 +0100
committerJens Axboe <axboe@kernel.dk>2018-11-07 13:04:22 -0700
commitdf376b2ed51a2777c3398e038992f62523c0f932 (patch)
tree18169f272490df584b3b9ed7ebe6736368c69f19 /block/blk-merge.c
parent9fe5c59ff6a1e5e26a39b75489a1420e7eaaf0b1 (diff)
downloadlinux-df376b2ed51a2777c3398e038992f62523c0f932.tar.bz2
block: respect virtual boundary mask in bvecs
With drivers that are settting a virtual boundary constrain, we are seeing a lot of bio splitting and smaller I/Os being submitted to the driver. This happens because the bio gap detection code does not account cases where PAGE_SIZE - 1 is bigger than queue_virt_boundary() and thus will split the bio unnecessarily. Cc: Jan Kara <jack@suse.cz> Cc: Bart Van Assche <bvanassche@acm.org> Cc: Ming Lei <ming.lei@redhat.com> Reviewed-by: Sagi Grimberg <sagi@grimberg.me> Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Acked-by: Keith Busch <keith.busch@intel.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-merge.c')
-rw-r--r--block/blk-merge.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-merge.c b/block/blk-merge.c
index 6b5ad275ed56..208658a901c6 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -46,7 +46,7 @@ static inline bool bio_will_gap(struct request_queue *q,
bio_get_first_bvec(prev_rq->bio, &pb);
else
bio_get_first_bvec(prev, &pb);
- if (pb.bv_offset)
+ if (pb.bv_offset & queue_virt_boundary(q))
return true;
/*