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From: Jason Wang <jasowang@redhat.com>
To: Jiang Dongxu <jiangdongxu1@huawei.com>
Cc: eric.fangyi@huawei.com, mst@redhat.com,
	linux-kernel@vger.kernel.org,
	virtualization@lists.linux-foundation.org,
	eperezma <eperezma@redhat.com>,
	longpeng2@huawei.com, Siwei Liu <loseweigh@gmail.com>
Subject: Re: [PATCH 0/2] vdpa: Add logging operatins
Date: Mon, 11 Sep 2023 14:56:58 +0800	[thread overview]
Message-ID: <CACGkMEsP+3nTjG8gj0PoYg0DvyqqOpJKoAxG=m27t+iv-6GVbQ@mail.gmail.com> (raw)
In-Reply-To: <cover.1693012755.git.jiangdongxu1@huawei.com>

Adding Eugenio and Si Wei.

On Sat, Aug 26, 2023 at 9:24 AM Jiang Dongxu <jiangdongxu1@huawei.com> wrote:
>
> From: jiangdongxu <jiangdongxu1@huawei.com>
>
> Currently, the vdpa device supports suspend and resume operations.
> To support vdpa device live migration, we need to support logging
> operations and device state save/load opertions.
>
> These series introduces some new operations for vdpa devices.
> They allow vdpa to enable logging while vm start live migration.
>
> And I will submit another patches about saving and loading
> vdpa device state later.

Thanks for working on this, I have several questions:

1) Is there an example implementation of the logging in the drivers?
We need a real user in order to merge this.
2) Is the logging based on IOVA or VA? How the DMA isolation is being
done with this? Do we need a SET_LOGGING_ASID uAPI for this? (We had
some discussion on this in the past).

Thanks

>
> jiangdongxu (2):
>   vdpa: add log operations
>   vhost-vdpa: add uAPI for logging
>
>  drivers/vhost/vdpa.c       | 49 ++++++++++++++++++++++++++++++++++++++
>  include/linux/vdpa.h       | 14 +++++++++++
>  include/uapi/linux/vhost.h |  4 ++++
>  3 files changed, 67 insertions(+)
>
> --
> 2.27.0
>

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       reply	other threads:[~2023-09-11  6:57 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <cover.1693012755.git.jiangdongxu1@huawei.com>
2023-09-11  6:56 ` Jason Wang [this message]
2023-10-18 15:07   ` [PATCH 0/2] vdpa: Add logging operatins Michael S. Tsirkin
2023-11-01 13:01   ` Michael S. Tsirkin

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