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| author |   Ming Lei <ming.lei@canonical.com> | 2014-07-06 16:39:26 +0200 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2014-07-25 17:17:00 -0400 |
| commit | 938ece711c5b1ba4fa8e3b9fc8cc03843ae82a5b (patch) | |
| tree | b0e463b8a15699a1eb68f92baf3ed52200f255aa /firmware | |
| parent | hpsa: fix bad -ENOMEM return value in hpsa_big_passthru_ioctl (diff) | |
| download | linux-dev-938ece711c5b1ba4fa8e3b9fc8cc03843ae82a5b.tar.xz linux-dev-938ece711c5b1ba4fa8e3b9fc8cc03843ae82a5b.zip | |
virtio-scsi: replace target spinlock with seqcount
The spinlock of tgt_lock is only for serializing read and write
req_vq, one lockless seqcount is enough for the purpose.
On one 16core VM with vhost-scsi backend, the patch can improve
IOPS with 3% on random read test.
Signed-off-by: Ming Lei <ming.lei@canonical.com>
[Add initialization in virtscsi_target_alloc. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'firmware')
0 files changed, 0 insertions, 0 deletions