netdev - Re: [PATCH v2 iwl-net 0/8] ice: fix AF_XDP ZC timeout and concurrency issues

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Date: Fri, 31 May 2024 16:52:22 -0700
From: "Nelson, Shannon" <shannon.nelson@....com>
To: Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
 intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org, anthony.l.nguyen@...el.com,
 magnus.karlsson@...el.com, michal.kubiak@...el.com, larysa.zaremba@...el.com
Subject: Re: [PATCH v2 iwl-net 0/8] ice: fix AF_XDP ZC timeout and concurrency
 issues

On 5/29/2024 4:23 AM, Maciej Fijalkowski wrote:
> 
> Hi,
> 
> changes included in this patchset address an issue that customer has
> been facing when AF_XDP ZC Tx sockets were used in combination with flow
> control and regular Tx traffic.
> 
> After executing:
> ethtool --set-priv-flags $dev link-down-on-close on
> ethtool -A $dev rx on tx on
> 
> launching multiple ZC Tx sockets on $dev + pinging remote interface (so
> that regular Tx traffic is present) and then going through down/up of
> $dev, Tx timeout occured and then most of the time ice driver was unable
> to recover from that state.
> 
> These patches combined together solve the described above issue on
> customer side. Main focus here is to forbid producing Tx descriptors
> when either carrier is not yet initialized or process of bringing
> interface down has already started.
> 
> Thanks,
> Maciej
> 
> v1->v2:
> - fix kdoc issues in patch 6 and 8
> - drop Larysa's patches for now
> 
> 
> Maciej Fijalkowski (7):
>    ice: don't busy wait for Rx queue disable in ice_qp_dis()
>    ice: replace synchronize_rcu with synchronize_net
>    ice: modify error handling when setting XSK pool in ndo_bpf
>    ice: toggle netif_carrier when setting up XSK pool
>    ice: improve updating ice_{t,r}x_ring::xsk_pool
>    ice: add missing WRITE_ONCE when clearing ice_rx_ring::xdp_prog
>    ice: xsk: fix txq interrupt mapping
> 
> Michal Kubiak (1):
>    ice: respect netif readiness in AF_XDP ZC related ndo's

Aside from a couple minor notes, these seem reasonable.

For the set:
Reviewed-by: Shannon Nelson <shannon.nelson@....com>

> 
>   drivers/net/ethernet/intel/ice/ice.h      |   6 +-
>   drivers/net/ethernet/intel/ice/ice_base.c |   4 +-
>   drivers/net/ethernet/intel/ice/ice_main.c |   2 +-
>   drivers/net/ethernet/intel/ice/ice_txrx.c |   6 +-
>   drivers/net/ethernet/intel/ice/ice_xsk.c  | 150 +++++++++++++---------
>   drivers/net/ethernet/intel/ice/ice_xsk.h  |   4 +-
>   6 files changed, 101 insertions(+), 71 deletions(-)
> 
> --
> 2.34.1
> 
>