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Subject: sxe2 driver bug due to mempool layer violation
Date: Mon, 13 Jul 2026 14:04:35 +0200
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Thread-Topic: sxe2 driver bug due to mempool layer violation
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From: =?iso-8859-1?Q?Morten_Br=F8rup?= <mb@smartsharesystems.com>
To: "Jie Liu" <liujie5@linkdatatechnology.com>,
 "Stephen Hemminger" <stephen@networkplumber.org>
Cc: <dev@dpdk.org>
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Hi Jie Liu,

Your sxe2 driver is accessing the flushthresh field in the mempool =
structure [1].
This field is obsolete, as the mempool cache algorithm has been updated =
[2].
If you need to bypass the mempool API and work directly with mempool =
internals, please keep your code up to date with the internals of the =
mempool library implementation.

Please submit an updated version of your driver, or the patch to support =
AVX512 needs to be reverted.

It looks like your driver introduced something similar to what the Intel =
common drivers were previously doing [3]; the Intel common drivers were =
updated accordingly [4].

[1]: =
https://github.com/DPDK/dpdk/blob/v26.07-rc3/drivers/net/sxe2/sxe2_txrx_v=
ec_avx512.c#L70
[2]: =
https://github.com/DPDK/dpdk/commit/f5e1310f16e0909e7e7f71807123644c63b23=
cba
[3]: =
https://github.com/DPDK/dpdk/blob/v26.03/drivers/net/intel/common/tx.h#L3=
15
[4]: =
https://github.com/DPDK/dpdk/commit/062d6fe5d00d837ecb1a2b77b4a306e3619a7=
fde


Venlig hilsen / Kind regards,
-Morten Br=F8rup