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Message-ID: <ZN5Mvh9c+joFcJbb@x130> Date: Thu, 17 Aug 2023 09:37:18 -0700 From: Saeed Mahameed <saeed@...nel.org> To: Jakub Kicinski <kuba@...nel.org> Cc: Saeed Mahameed <saeedm@...dia.com>, Vadim Fedorenko <vadfed@...a.com>, Rahul Rameshbabu <rrameshbabu@...dia.com>, Gal Pressman <gal@...dia.com>, Bar Shapira <bshapira@...dia.com>, Vadim Fedorenko <vadim.fedorenko@...ux.dev>, Richard Cochran <richardcochran@...il.com>, netdev@...r.kernel.org Subject: Re: [PATCH net] Revert "net/mlx5: Update cyclecounter shift value to improve ptp free running mode precision" On 16 Aug 19:38, Jakub Kicinski wrote: >On Tue, 15 Aug 2023 08:15:07 -0700 Vadim Fedorenko wrote: >> From: Vadim Fedorenko <vadim.fedorenko@...ux.dev> >> >> This reverts commit 6a40109275626267ebf413ceda81c64719b5c431. >> >> There was an assumption in the original commit that all the devices >> supported by mlx5 advertise 1GHz as an internal timer frequency. >> Apparently at least ConnectX-4 Lx (MCX4431N-GCAN) provides 156.250Mhz >> as an internal frequency and the original commit breaks PTP >> synchronization on these cards. > >Hi Saeed, any preference here? Given we're past -rc6 and the small >size of the revert it seems like a tempting solution? Rahul's solution is also very small and already passed review, we will be conducting some tests, share the patch with Vadim for testing and I will be submitting it early next week. >
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