netdev - RE: [Intel-wired-lan] [PATCH net-next v2 6/6] ice: sleep, don't busy-wait, in the SQ send retry loop

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Message-ID: <CO1PR11MB5028EB98BBBCD9629E70BA29A0639@CO1PR11MB5028.namprd11.prod.outlook.com>
Date:   Thu, 20 Apr 2023 20:59:36 +0000
From:   "Mekala, SunithaX D" <sunithax.d.mekala@...el.com>
To:     mschmidt <mschmidt@...hat.com>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC:     Andrew Lunn <andrew@...n.ch>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "Kolacinski, Karol" <karol.kolacinski@...el.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        Simon Horman <simon.horman@...igine.com>
Subject: RE: [Intel-wired-lan] [PATCH net-next v2 6/6] ice: sleep, don't
 busy-wait, in the SQ send retry loop

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Michal Schmidt
> Sent: Wednesday, April 12, 2023 1:19 AM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: Andrew Lunn <andrew@...n.ch>; netdev@...r.kernel.org; Brandeburg, Jesse <jesse.brandeburg@...el.com>; Kolacinski, Karol <karol.kolacinski@...el.com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Simon Horman <simon.horman@...igine.com>
> Subject: [Intel-wired-lan] [PATCH net-next v2 6/6] ice: sleep, don't busy-wait, in the SQ send retry loop
>
> 10 ms is a lot of time to spend busy-waiting. Sleeping is clearly allowed here, because we have just returned from ice_sq_send_cmd(), which takes a mutex.
>
> On kernels with HZ=100, this msleep may be twice as long, but I don't think it matters.
> I did not actually observe any retries happening here.
>
> Signed-off-by: Michal Schmidt <mschmidt@...hat.com>
> ---
>  drivers/net/ethernet/intel/ice/ice_common.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
Tested-by: Sunitha Mekala <sunithax.d.mekala@...el.com> (A Contingent worker at Intel)