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Mon, 10 Jun 2019 05:36:19 -0700 (PDT) Received: from localhost ([51.15.41.238]) by smtp.gmail.com with ESMTPSA id f204sm13850147wme.18.2019.06.10.05.36.18 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 10 Jun 2019 05:36:18 -0700 (PDT) Date: Mon, 10 Jun 2019 13:36:17 +0100 From: Stefan Hajnoczi To: Paolo Bonzini 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> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="GvuyDaC2GNSBQusT" Content-Disposition: inline In-Reply-To: <20190530112811.3066-1-pbonzini@redhat.com> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --GvuyDaC2GNSBQusT Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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 --GvuyDaC2GNSBQusT Content-Type: application/pgp-signature; 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