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Message-ID: <alpine.DEB.2.00.1009042042130.9425@router.home> Date: Sat, 4 Sep 2010 20:47:39 -0500 (CDT) From: Christoph Lameter <cl@...ux.com> To: Christian Riesch <christian.riesch@...il.com> cc: Richard Cochran <richardcochran@...il.com>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-api@...r.kernel.org Subject: Re: [PATCH 0/2] [RFC] posix clock tuning On Sat, 4 Sep 2010, Christian Riesch wrote: > Richard's idea is to support clock hardware for IEEE 1588 (PTP, Precision Time > Protocol). Have a look at the earlier discussions: > > http://lkml.org/lkml/2010/8/16/90 A superficial scan does not give me any definite agreement on an approach. The patchset also needs to be CCed to John Stultz. Without a summary I still am not clear what this is supposed to address. Tuning of the PTP clock can be done with driver specific configuration rather than a new POSIX clock. That is at least how SGI_CYCLE is operating which is similar. > http://lkml.org/lkml/2010/8/23/49 Ok this goes more into something that may prove useful but it would be very helpful still to have a clear discussion as to why this is all needed. From what I can tell the functionality is already there and another clock device (CLOCK_SGI_CYCLE) is already providing a model for how a PTP clock could be controlled and used. -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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