linux-kernel - Re: Kernel without RTC

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Message-ID: <20170308131730.zrznsnk5oldfuoib@piout.net>
Date:   Wed, 8 Mar 2017 14:17:30 +0100
From:   Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:     "Shah, Nehal-bakulchandra" <Nehal-Bakulchandra.shah@....com>
Cc:     a.zummo@...ertech.it, rtc-linux@...glegroups.com,
        Jagadish.Hadimani@....com, linux-kernel@...r.kernel.org
Subject: Re: Kernel without RTC

Hi,

On 07/03/2017 at 00:48:18 +0530, Shah, Nehal-bakulchandra wrote:
> Hi,
> 
> Currently we are having hardware which does not have RTC. It is single processor system. However it does have TSC timer.
> 
> Now, how to use scheduler with only TSC as current kernel scheduler leverage the RTC for scheduling? I had seen one old patch
> 
> http://marc.info/?l=linux-kernel&m=112013203625990&w=2 
> 
> But i guess this patch was later on not taken, It will be great if you can some pointers to move forward?
> 

The kernel doesn't use the RTC for its time source so it can
already work without an RTC.


-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com