Date:   Tue, 24 Jan 2023 00:55:06 -0500
From:   "Michael S. Tsirkin" <mst@redhat.com>
To:     Alistair Popple <apopple@nvidia.com>
Cc:     linux-mm@kvack.org, cgroups@vger.kernel.org,
        linux-kernel@vger.kernel.org, jgg@nvidia.com, jhubbard@nvidia.com,
        tjmercier@google.com, hannes@cmpxchg.org, surenb@google.com,
        mkoutny@suse.com, daniel@ffwll.ch,
        Jason Wang <jasowang@redhat.com>, kvm@vger.kernel.org,
        virtualization@lists.linux-foundation.org, netdev@vger.kernel.org
Subject: Re: [RFC PATCH 02/19] drivers/vhost: Convert to use vm_account
Message-ID: <20230124005356-mutt-send-email-mst@kernel.org>
References: <cover.f52b9eb2792bccb8a9ecd6bc95055705cfe2ae03.1674538665.git-series.apopple@nvidia.com>
 <97a17a6ab7e59be4287a2a94d43bb787300476b4.1674538665.git-series.apopple@nvidia.com>
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On Tue, Jan 24, 2023 at 04:42:31PM +1100, Alistair Popple wrote:
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index ec32f78..a31dd53 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c

...

> @@ -780,6 +780,10 @@ static int vhost_vdpa_map(struct vhost_vdpa *v, struct vhost_iotlb *iotlb,
>  	u32 asid = iotlb_to_asid(iotlb);
>  	int r = 0;
>  
> +	if (!vdpa->use_va)
> +		if (vm_account_pinned(&dev->vm_account, PFN_DOWN(size)))
> +			return -ENOMEM;
> +
>  	r = vhost_iotlb_add_range_ctx(iotlb, iova, iova + size - 1,
>  				      pa, perm, opaque);
>  	if (r)

I suspect some error handling will have to be reworked then, no?

> -- 
> git-series 0.9.1