Re: [PATCH v2 2/6] virtio-scsi: replace target spinlock with seqcount

[Venkatesh Srinivas]

On 6/4/14, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> From: Ming Lei <ming.lei@xxxxxxxxxxxxx>
>
> 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@xxxxxxxxxxxxx>
> [Add initialization in virtscsi_target_alloc. - Paolo]
> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>

Reviewed-by: Venkatesh Srinivas <venkateshs@xxxxxxxxxx>

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