Re: [PATCH iwl-net] ixgbe: do not configure xps for XDP queues

[Simon Horman]

On Mon, May 18, 2026 at 01:15:04PM +0200, Larysa Zaremba wrote:
> netif_set_xps_queue() should not be called for an XDP Tx queue, since such
> queues are not netdev-exposed. On systems with number of CPUs >=64, on E610
> adapter, netdev is configured with maximum number queue pairs being 63
> (due to MSI-X assignment), but configuring XDP results in 64 XDP queues.
> 
> So, during XDP program load, when netif_set_xps_queue() is called for the
> last XDP queue, we get a WARNING with a call trace and KASAN report
> afterwards (if enabled).
> 
> [ 2012.699800] WARNING: net/core/dev.c:2854 at __netif_set_xps_queue+0x116a/0x1e40, CPU#36: xdpsock/103668

...

> 
> Skip XPS configuration for XDP Tx queues.
> 
> Fixes: 33fdc82f0883 ("ixgbe: add support for XDP_TX action")
> Reviewed-by: Alexander Lobakin <aleksander.lobakin@xxxxxxxxx>
> Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@xxxxxxxxx>
> Signed-off-by: Larysa Zaremba <larysa.zaremba@xxxxxxxxx>

Reviewed-by: Simon Horman <horms@xxxxxxxxxx>