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Date: Mon, 1 Feb 2021 13:47:08 +0800 From: Jason Wang <jasowang@...hat.com> To: Stefano Garzarella <sgarzare@...hat.com>, virtualization@...ts.linux-foundation.org Cc: Xie Yongji <xieyongji@...edance.com>, "Michael S. Tsirkin" <mst@...hat.com>, Laurent Vivier <lvivier@...hat.com>, Stefan Hajnoczi <stefanha@...hat.com>, linux-kernel@...r.kernel.org, Max Gurtovoy <mgurtovoy@...dia.com>, kvm@...r.kernel.org Subject: Re: [PATCH RFC v2 06/10] vdpa_sim: cleanup kiovs in vdpasim_free() On 2021/1/28 下午10:41, Stefano Garzarella wrote: > vringh_getdesc_iotlb() allocates memory to store the kvec, that > is freed with vringh_kiov_cleanup(). > > vringh_getdesc_iotlb() is able to reuse a kvec previously allocated, > so in order to avoid to allocate the kvec for each request, we are > not calling vringh_kiov_cleanup() when we finished to handle a > request, but we should call it when we free the entire device. > > Signed-off-by: Stefano Garzarella <sgarzare@...hat.com> Acked-by: Jason Wang <jasowang@...hat.com> > --- > drivers/vdpa/vdpa_sim/vdpa_sim.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c > index 53238989713d..a7aeb5d01c3e 100644 > --- a/drivers/vdpa/vdpa_sim/vdpa_sim.c > +++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c > @@ -562,8 +562,15 @@ static int vdpasim_dma_unmap(struct vdpa_device *vdpa, u64 iova, u64 size) > static void vdpasim_free(struct vdpa_device *vdpa) > { > struct vdpasim *vdpasim = vdpa_to_sim(vdpa); > + int i; > > cancel_work_sync(&vdpasim->work); > + > + for (i = 0; i < vdpasim->dev_attr.nvqs; i++) { > + vringh_kiov_cleanup(&vdpasim->vqs[i].out_iov); > + vringh_kiov_cleanup(&vdpasim->vqs[i].in_iov); > + } > + > put_iova_domain(&vdpasim->iova); > iova_cache_put(); > kvfree(vdpasim->buffer);
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