Hi, Jens & Rusty
This version is rebased against linux-next which resolves the conflict with
Paolo Bonzini's 'virtio-blk: allow toggling host cache between writeback and
writethrough' patch.
Patch 1/3 and 2/3 applies on linus's master as well. Since Rusty will pick up
patch 3/3 so the changes to block core (adding blk_bio_map_sg()) will have a
user.
Jens, could you please consider picking up the dependencies 1/3 and 2/3 in your
tree. Thanks!
This patchset implements bio-based IO path for virito-blk to improve
performance.
Fio test shows bio-based IO path gives the following performance improvement:
1) Ramdisk device
With bio-based IO path, sequential read/write, random read/write
IOPS boost : 28%, 24%, 21%, 16%
Latency improvement: 32%, 17%, 21%, 16%
2) Fusion IO device
With bio-based IO path, sequential read/write, random read/write
IOPS boost : 11%, 11%, 13%, 10%
Latency improvement: 10%, 10%, 12%, 10%
Asias He (3):
block: Introduce __blk_segment_map_sg() helper
block: Add blk_bio_map_sg() helper
virtio-blk: Add bio-based IO path for virtio-blk
block/blk-merge.c | 117 +++++++++++++++++--------
drivers/block/virtio_blk.c | 203 +++++++++++++++++++++++++++++++++++---------
include/linux/blkdev.h | 2 +
3 files changed, 247 insertions(+), 75 deletions(-)
--
1.7.10.4
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