netdev - RE: [Intel-wired-lan] [PATCH intel-net v2] ice: fix reservation of resources for RDMA when disabled

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Message-ID: <IA1PR11MB62416710DD666A1C278002D48BDF2@IA1PR11MB6241.namprd11.prod.outlook.com>
Date: Mon, 17 Mar 2025 11:01:44 +0000
From: "Rinitha, SX" <sx.rinitha@...el.com>
To: Jesse Brandeburg <jbrandeb@...nel.org>, "intel-wired-lan@...ts.osuosl.org"
	<intel-wired-lan@...ts.osuosl.org>
CC: "Brandeburg, Jesse" <jbrandeburg@...udflare.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "kernel-team@...udflare.com"
	<kernel-team@...udflare.com>, "leon@...nel.org" <leon@...nel.org>, "Kitszel,
 Przemyslaw" <przemyslaw.kitszel@...el.com>, "Ertman, David M"
	<david.m.ertman@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH intel-net v2] ice: fix reservation of
 resources for RDMA when disabled

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Jesse Brandeburg
> Sent: 06 March 2025 23:27
> To: intel-wired-lan@...ts.osuosl.org
> Cc: Brandeburg, Jesse <jbrandeburg@...udflare.com>; netdev@...r.kernel.org; kernel-team@...udflare.com; jbrandeb@...nel.org; leon@...nel.org; Kitszel, Przemyslaw <przemyslaw.kitszel@...el.com>; Ertman, David M <david.m.ertman@...el.com>
> Subject: [Intel-wired-lan] [PATCH intel-net v2] ice: fix reservation of resources for RDMA when disabled
>
> From: Jesse Brandeburg <jbrandeburg@...udflare.com>
>
> If the CONFIG_INFINIBAND_IRDMA symbol is not enabled as a module or a built-in, then don't let the driver reserve resources for RDMA. The result of this change is a large savings in resources for older kernels, and a cleaner driver configuration for the IRDMA=n case for old and new kernels.
>
> Implement this by avoiding enabling the RDMA capability when scanning hardware capabilities.
>
> Note: Loading the out-of-tree irdma driver in connection to the in-kernel ice driver, is not supported, and should not be attempted, especially when disabling IRDMA in the kernel config.
>
> Fixes: d25a0fc41c1f ("ice: Initialize RDMA support")
> Signed-off-by: Jesse Brandeburg <jbrandeburg@...udflare.com>
> Acked-by: Dave Ertman <david.m.ertman@...el.com>
> ---
> v2: resend with acks, add note about oot irdma (Leon), reword commit message
> v1: https://lore.kernel.org/netdev/20241114000105.703740-1-jbrandeb@kernel.org/
> ---
> drivers/net/ethernet/intel/ice/ice_common.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>

Tested-by: Rinitha S <sx.rinitha@...el.com> (A Contingent worker at Intel)