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. > > This applies to any HBA, either singlequeue or multiqueue; the second > patch implements it for virtio-scsi. > > Paolo > > Paolo Bonzini (2): > scsi_host: add support for request batching > virtio_scsi: implement request batching > > 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(-) > > -- > 2.21.0 > Reviewed-by: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
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