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Subject[PATCH 0/5] virtio-scsi: create a separate workqueue
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patch 1-3,5 are some cleanups.
patch 4: create a separate work queue for virtio-scsi
to improve the performance, I tested with tmpfs backed
disk, the config file is like below,
[global]
bsrange=4k-64k
ioengine=libaio
direct=1
iodepth=4
loops=10
size=64M

Before:
Disk stats (read/write):
sda: ios=6547/5275, merge=37/39, ticks=3144/2645, in_queue=5780, util=81.62%
sdb: ios=6542/5277, merge=54/59, ticks=3234/3143, in_queue=6364, util=84.50%
sdc: ios=6532/5244, merge=65/62, ticks=3440/3076, in_queue=6505, util=86.83%

After:
Disk stats (read/write):
sda: ios=6349/5318, merge=77/89, ticks=4820/3169, in_queue=7991, util=90.62%
sdb: ios=6364/5358, merge=39/53, ticks=3810/2816, in_queue=6615, util=84.63%
sdc: ios=6458/5352, merge=74/47, ticks=4425/3048, in_queue=7459, util=88.41%


Wanlong Gao (5):
virtio-scsi: remove the useless assignment
virtio-scsi: remove the needless variable gfp_mask
virtio-scsi: use pr_err instead of printk
virtio-scsi: create a separate work queue for virtio-scsi
virtio-scsi: tidy up the goto label in init()



Cc: James E.J. Bottomley <JBottomley@parallels.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-scsi@vger.kernel.org
Cc: kvm@vger.kernel.org
drivers/scsi/virtio_scsi.c | 43 +++++++++++++++++++++++--------------------
1 file changed, 23 insertions(+), 20 deletions(-)

--
1.8.0



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