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charset="utf-8" Coalesce map or unmap operations to exact one DMA batch to reduce potential impact on performance. Signed-off-by: Si-Wei Liu Acked-by: Jason Wang --- net/vhost-vdpa.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c index bc72345..1c1d61f 100644 --- a/net/vhost-vdpa.c +++ b/net/vhost-vdpa.c @@ -715,10 +715,11 @@ out: v->shared->iova_range.l= ast); } =20 + vhost_vdpa_dma_batch_begin_once(v->shared, v->address_space_id); r =3D vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer, vhost_vdpa_net_cvq_cmd_page_len(), false); if (unlikely(r < 0)) { - return r; + goto err; } =20 r =3D vhost_vdpa_cvq_map_buf(&s->vhost_vdpa, s->status, @@ -727,18 +728,23 @@ out: vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); } =20 +err: + vhost_vdpa_dma_batch_end_once(v->shared, v->address_space_id); return r; } =20 static void vhost_vdpa_net_cvq_stop(NetClientState *nc) { VhostVDPAState *s =3D DO_UPCAST(VhostVDPAState, nc, nc); + struct vhost_vdpa *v =3D &s->vhost_vdpa; =20 assert(nc->info->type =3D=3D NET_CLIENT_DRIVER_VHOST_VDPA); =20 if (s->vhost_vdpa.shadow_vqs_enabled) { + vhost_vdpa_dma_batch_begin_once(v->shared, v->address_space_id); vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->cvq_cmd_out_buffer); vhost_vdpa_cvq_unmap_buf(&s->vhost_vdpa, s->status); + vhost_vdpa_dma_batch_end_once(v->shared, v->address_space_id); } =20 vhost_vdpa_net_client_stop(nc); --=20 1.8.3.1