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SubjectRe: [PATCH, RFC 2/8] ARM: twd: register clock event for 1 core SMP
On Monday 18 February 2013 05:07 PM, Afzal Mohammed wrote:
> Register percpu local timer for scheduler tick in the case of one core
> SMP configuration. In other cases - secondary cpu's as well as boot
> cpu's having more than one core, this is being registered as per
> existing boot flow, with a difference that they happens after delay
> calibration. Registering the clock for tick in case of one core should
> be done before Kernel calibrates delay (this is required to boot,
> unless local timer is the only one registered for tick). Registering
> twd local timer at init_time (which platforms are doing now) helps
> achieve that with the proposed change.
> This helps in an almost booting Kernel (minimal) by only relying on
> ARM parts for an A9 one core SMP.
> Signed-off-by: Afzal Mohammed <>
> ---
As mentioned in cover-letter, I don't think we have good
reasoning to make TWD to work with UP configuration. Even
you fix the timer code, there are more cascaded dependencies
which is not worth the effort.


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