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Date:   Mon, 10 Jun 2019 13:36:17 +0100
From:   Stefan Hajnoczi <stefanha@gmail.com>
To:     Paolo Bonzini <pbonzini@redhat.com>
Cc:     linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        jejb@linux.ibm.com, martin.petersen@oracle.com,
        linux-scsi@vger.kernel.org, stefanha@redhat.com
Subject: Re: [PATCH 0/2] scsi: add support for request batching
Message-ID: <20190610123617.GK14257@stefanha-x1.localdomain>
References: <20190530112811.3066-1-pbonzini@redhat.com>
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On Thu, May 30, 2019 at 01:28:09PM +0200, Paolo Bonzini wrote:
> This allows a list of requests to be issued, with the LLD only writing
> the hardware doorbell when necessary, after the last request was prepared.
> This is more efficient if we have lists of requests to issue, particularly
> on virtualized hardware, where writing the doorbell is more expensive than
> on real hardware.
>=20
> This applies to any HBA, either singlequeue or multiqueue; the second
> patch implements it for virtio-scsi.
>=20
> Paolo
>=20
> Paolo Bonzini (2):
>   scsi_host: add support for request batching
>   virtio_scsi: implement request batching
>=20
>  drivers/scsi/scsi_lib.c    | 37 ++++++++++++++++++++++---
>  drivers/scsi/virtio_scsi.c | 55 +++++++++++++++++++++++++++-----------
>  include/scsi/scsi_cmnd.h   |  1 +
>  include/scsi/scsi_host.h   | 16 +++++++++--
>  4 files changed, 89 insertions(+), 20 deletions(-)
>=20
> --=20
> 2.21.0
>=20

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

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