RE: [Intel-wired-lan] [PATCH net v4 1/3] ixgbe: allow to increase MTU to 3K with XDP enabled

[Rout, ChandanX]

>-----Original Message-----
>From: Intel-wired-lan <intel-wired-lan-bounces@xxxxxxxxxx> On Behalf Of
>Jason Xing
>Sent: 08 February 2023 08:14
>To: Brandeburg, Jesse <jesse.brandeburg@xxxxxxxxx>; Nguyen, Anthony L
><anthony.l.nguyen@xxxxxxxxx>; davem@xxxxxxxxxxxxx;
>edumazet@xxxxxxxxxx; kuba@xxxxxxxxxx; pabeni@xxxxxxxxxx;
>richardcochran@xxxxxxxxx; ast@xxxxxxxxxx; daniel@xxxxxxxxxxxxx;
>hawk@xxxxxxxxxx; john.fastabend@xxxxxxxxx; Lobakin, Alexandr
><alexandr.lobakin@xxxxxxxxx>; Fijalkowski, Maciej
><maciej.fijalkowski@xxxxxxxxx>
>Cc: kerneljasonxing@xxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-
>kernel@xxxxxxxxxxxxxxx; intel-wired-lan@xxxxxxxxxxxxxxxx;
>bpf@xxxxxxxxxxxxxxx; Jason Xing <kernelxing@xxxxxxxxxxx>
>Subject: [Intel-wired-lan] [PATCH net v4 1/3] ixgbe: allow to increase MTU to
>3K with XDP enabled
>
>From: Jason Xing <kernelxing@xxxxxxxxxxx>
>
>Recently I encountered one case where I cannot increase the MTU size
>directly from 1500 to a much bigger value with XDP enabled if the server is
>equipped with IXGBE card, which happened on thousands of servers in
>production environment. After appling the current patch, we can set the
>maximum MTU size to 3K.
>
>This patch follows the behavior of changing MTU as i40e/ice does.
>
>Referrences:
>[1] commit 23b44513c3e6 ("ice: allow 3k MTU for XDP") [2] commit
>0c8493d90b6b ("i40e: add XDP support for pass and drop actions")
>
>Fixes: fabf1bce103a ("ixgbe: Prevent unsupported configurations with XDP")
>Signed-off-by: Jason Xing <kernelxing@xxxxxxxxxxx>
>---
>v4:
>1) use ':' instead of '-' for kdoc
>
>v3:
>1) modify the titile and body message.
>
>v2:
>1) change the commit message.
>2) modify the logic when changing MTU size suggested by Maciej and
>Alexander.
>---
> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 25 ++++++++++++-------
> 1 file changed, 16 insertions(+), 9 deletions(-)
>

Tested-by: Chandan Kumar Rout <chandanx.rout@xxxxxxxxx> (A Contingent Worker at Intel)