From: Jakub Kicinski <kubakici@wp.pl>
To: jesse.brandeburg@intel.com
Cc: Sridhar Samudrala <sridhar.samudrala@intel.com>,
mst@redhat.com, stephen@networkplumber.org,
netdev@vger.kernel.org,
virtualization@lists.linux-foundation.org,
virtio-dev@lists.oasis-open.org,
Alexander Duyck <alexander.h.duyck@intel.com>
Subject: Re: [PATCH net-next 0/2] Enable virtio to act as a master for a passthru device
Date: Tue, 2 Jan 2018 18:16:03 -0800 [thread overview]
Message-ID: <20180102181603.7fe4fd1e@cakuba.netronome.com> (raw)
In-Reply-To: <1514939738-22423-1-git-send-email-sridhar.samudrala@intel.com>
On Tue, 2 Jan 2018 16:35:36 -0800, Sridhar Samudrala wrote:
> This patch series enables virtio to switch over to a VF datapath when a VF
> netdev is present with the same MAC address. It allows live migration of a VM
> with a direct attached VF without the need to setup a bond/team between a
> VF and virtio net device in the guest.
>
> The hypervisor needs to unplug the VF device from the guest on the source
> host and reset the MAC filter of the VF to initiate failover of datapath to
> virtio before starting the migration. After the migration is completed, the
> destination hypervisor sets the MAC filter on the VF and plugs it back to
> the guest to switch over to VF datapath.
>
> It is based on netvsc implementation and it may be possible to make this code
> generic and move it to a common location that can be shared by netvsc and virtio.
>
> This patch series is based on the discussion initiated by Jesse on this thread.
> https://marc.info/?l=linux-virtualization&m=151189725224231&w=2
How does the notion of a device which is both a bond and a leg of a
bond fit with Alex's recent discussions about feature propagation?
Which propagation rules will apply to VirtIO master? Meaning of the
flags on a software upper device may be different. Why muddy the
architecture like this and not introduce a synthetic bond device?
next prev parent reply other threads:[~2018-01-03 2:16 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-03 0:35 [PATCH net-next 0/2] Enable virtio to act as a master for a passthru device Sridhar Samudrala
2018-01-03 0:35 ` [PATCH net-next 1/2] virtio_net: Introduce VIRTIO_NET_F_MASTER feature bit Sridhar Samudrala
2018-01-03 16:36 ` David Miller
2018-01-03 17:43 ` Michael S. Tsirkin
2018-01-03 18:17 ` Samudrala, Sridhar
2018-01-03 0:35 ` [PATCH net-next 2/2] virtio_net: Extend virtio to use VF datapath when available Sridhar Samudrala
2018-01-03 2:16 ` Jakub Kicinski [this message]
2018-01-03 16:59 ` [PATCH net-next 0/2] Enable virtio to act as a master for a passthru device Alexander Duyck
2018-01-03 18:14 ` Samudrala, Sridhar
2018-01-03 18:28 ` Alexander Duyck
2018-01-04 0:22 ` Samudrala, Sridhar
[not found] ` <CADGSJ22TXcyJ1iAAtKho7S=jGfUzUsqvAx-HV2XuwV2sLwfR_Q@mail.gmail.com>
[not found] ` <b623709f-69ab-b491-3931-7df74745b723@intel.com>
[not found] ` <CADGSJ223aJjt6X-dA=pKVP3_5+BOQ==Rd017LqBrBsKWqXiNSw@mail.gmail.com>
[not found] ` <432a4b0a-fadc-3025-b9f6-09fd3e1b384a@intel.com>
[not found] ` <CADGSJ21rDfqzsnd+m5f6w=LqoTY3Bb0p1Pe+_tppdEm_8HysKA@mail.gmail.com>
2018-01-22 19:00 ` Siwei Liu
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