Re: [PATCH net-next v4 0/4] virtio-net: Link queues to NAPIs

[Jason Wang]

On Tue, Feb 25, 2025 at 11:47 PM Lei Yang <leiyang@xxxxxxxxxx> wrote:
>
> I tested this series of patches with virtio-net regression tests,
> everything works fine.
>
> Tested-by: Lei Yang <leiyang@xxxxxxxxxx>

If it's possible, I would like to add the resize (via ethtool) support
in the regression test.

Thanks

>
>
> On Tue, Feb 25, 2025 at 10:05 AM Joe Damato <jdamato@xxxxxxxxxx> wrote:
> >
> > Greetings:
> >
> > Welcome to v4.
> >
> > Jakub recently commented [1] that I should not hold this series on
> > virtio-net linking queues to NAPIs behind other important work that is
> > on-going and suggested I re-spin, so here we are :)
> >
> > This is a significant refactor from the rfcv3 and as such I've dropped
> > almost all of the tags from reviewers except for patch 4 (sorry Gerhard
> > and Jason; the changes are significant so I think patches 1-3 need to be
> > re-reviewed).
> >
> > As per the discussion on the v3 [2], now both RX and TX NAPIs use the
> > API to link queues to NAPIs. Since TX-only NAPIs don't have a NAPI ID,
> > commit 6597e8d35851 ("netdev-genl: Elide napi_id when not present") now
> > correctly elides the TX-only NAPIs (instead of printing zero) when the
> > queues and NAPIs are linked.
> >
> > See the commit message of patch 3 for an example of how to get the NAPI
> > to queue mapping information.
> >
> > See the commit message of patch 4 for an example of how NAPI IDs are
> > persistent despite queue count changes.
> >
> > Thanks,
> > Joe
> >
> > v4:
> >   - Dropped Jakub's patch (previously patch 1).
> >   - Significant refactor from v3 affecting patches 1-3.
> >   - Patch 4 added tags from Jason and Gerhard.
> >
> > rfcv3: https://lore.kernel.org/netdev/20250121191047.269844-1-jdamato@xxxxxxxxxx/
> >   - patch 3:
> >     - Removed the xdp checks completely, as Gerhard Engleder pointed
> >       out, they are likely not necessary.
> >
> >   - patch 4:
> >     - Added Xuan Zhuo's Reviewed-by.
> >
> > v2: https://lore.kernel.org/netdev/20250116055302.14308-1-jdamato@xxxxxxxxxx/
> >   - patch 1:
> >     - New in the v2 from Jakub.
> >
> >   - patch 2:
> >     - Previously patch 1, unchanged from v1.
> >     - Added Gerhard Engleder's Reviewed-by.
> >     - Added Lei Yang's Tested-by.
> >
> >   - patch 3:
> >     - Introduced virtnet_napi_disable to eliminate duplicated code
> >       in virtnet_xdp_set, virtnet_rx_pause, virtnet_disable_queue_pair,
> >       refill_work as suggested by Jason Wang.
> >     - As a result of the above refactor, dropped Reviewed-by and
> >       Tested-by from patch 3.
> >
> >   - patch 4:
> >     - New in v2. Adds persistent NAPI configuration. See commit message
> >       for more details.
> >
> > v1: https://lore.kernel.org/netdev/20250110202605.429475-1-jdamato@xxxxxxxxxx/
> >
> > [1]: https://lore.kernel.org/netdev/20250221142650.3c74dcac@xxxxxxxxxx/
> > [2]: https://lore.kernel.org/netdev/20250127142400.24eca319@xxxxxxxxxx/
> >
> > Joe Damato (4):
> >   virtio-net: Refactor napi_enable paths
> >   virtio-net: Refactor napi_disable paths
> >   virtio-net: Map NAPIs to queues
> >   virtio_net: Use persistent NAPI config
> >
> >  drivers/net/virtio_net.c | 100 ++++++++++++++++++++++++++++-----------
> >  1 file changed, 73 insertions(+), 27 deletions(-)
> >
> >
> > base-commit: 7183877d6853801258b7a8d3b51b415982e5097e
> > --
> > 2.45.2
> >
> >
>