linux-kernel - Re: [PATCH v3 net-next 2/6] net: hibmcge: Add support for rx checksum offload

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Message-ID: <20250227064708.7811dfa7@kernel.org>
Date: Thu, 27 Feb 2025 06:47:08 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Jijie Shao <shaojijie@...wei.com>
Cc: <davem@...emloft.net>, <edumazet@...gle.com>, <pabeni@...hat.com>,
 <andrew+netdev@...n.ch>, <horms@...nel.org>, <shenjian15@...wei.com>,
 <wangpeiyang1@...wei.com>, <liuyonglong@...wei.com>,
 <chenhao418@...wei.com>, <sudongming1@...wei.com>, <xujunsheng@...wei.com>,
 <shiyongbang@...wei.com>, <libaihan@...wei.com>,
 <jonathan.cameron@...wei.com>, <shameerali.kolothum.thodi@...wei.com>,
 <salil.mehta@...wei.com>, <netdev@...r.kernel.org>,
 <linux-kernel@...r.kernel.org>, <kalesh-anakkur.purayil@...adcom.com>
Subject: Re: [PATCH v3 net-next 2/6] net: hibmcge: Add support for rx
 checksum offload

On Thu, 27 Feb 2025 19:28:25 +0800 Jijie Shao wrote:
> rx checksum offload enable:
> 	device check ok ->  CHECKSUM_UNNECESSARY -> stack
> 	device check fail ->  drop

Don't drop packets on csum validation failure.
The stack can easily handle packets with bad csum.
And users will monitor stack metrics for csum errors.
Plus devices are wrong more often than the stack.