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Message-ID: <a666cea7-078d-4dc0-bad9-87fa15e44036@lunn.ch> Date: Tue, 17 Oct 2023 03:57:45 +0200 From: Andrew Lunn <andrew@...n.ch> To: Coco Li <lixiaoyan@...gle.com> Cc: Jakub Kicinski <kuba@...nel.org>, Eric Dumazet <edumazet@...gle.com>, Neal Cardwell <ncardwell@...gle.com>, Mubashir Adnan Qureshi <mubashirq@...gle.com>, Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org, Chao Wu <wwchao@...gle.com>, Wei Wang <weiwan@...gle.com>, David Ahern <dsahern@...nel.org> Subject: Re: [PATCH v2 net-next 2/5] net-smnp: reorganize SNMP fast path variables On Tue, Oct 17, 2023 at 01:47:13AM +0000, Coco Li wrote: > From: Chao Wu <wwchao@...gle.com> > > Reorganize fast path variables on tx-txrx-rx order. > Fast path cacheline ends afer LINUX_MIB_DELAYEDACKLOCKED. > There are only read-write variables here. > > Below data generated with pahole on x86 architecture. > > Fast path variables span cache lines before change: 12 > Fast path variables span cache lines after change: 2 As i pointed out for the first version, this is a UAPI file. Please could you add some justification that this does not cause any UAPI changes. Will old user space binaries still work after this? Thanks Andrew
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