[PATCH] TWD: enable one-shot mode

[sboyd@codeaurora.org (Stephen Boyd)]

On 12/24/2010 11:18 AM, Russell King - ARM Linux wrote:
> Allow one shot timer mode to be used with the TWD.  This allows
> NOHZ mode to be used on SMP systems using the TWD localtimer.
>
> Tested on Versatile Express.
>
> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
> ---
> Acks/Tested-by's would be appreciated, thanks.
>

I see this patch was already tested and merged but can you elaborate on
why this was done? From what I understand, NOHZ selects one-shot (like
is done in this patch), so why don't the machines with a TWD choose NOHZ
or high res timers?

Putting it another way, if my machine supports a oneshot capable
clockevent device should I be selecting oneshot regardless of the NOHZ
and high res config option being chosen?

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