Re: [RFC V2 PATCH 2/6] powerpc: Implement broadcast timer interrupt as an IPI message

2013-08-21 Thread Preeti U Murthy
Hi Ben On 08/22/2013 08:40 AM, Benjamin Herrenschmidt wrote: > On Wed, 2013-08-14 at 17:26 +0530, Preeti U Murthy wrote: >> -static irqreturn_t unused_action(int irq, void *data) >> +static irqreturn_t timer_action(int irq, void *data) >> { >> - /* This slot is unused and hence available fo

Re: [RFC V2 PATCH 2/6] powerpc: Implement broadcast timer interrupt as an IPI message

2013-08-21 Thread Benjamin Herrenschmidt
On Wed, 2013-08-14 at 17:26 +0530, Preeti U Murthy wrote: > -static irqreturn_t unused_action(int irq, void *data) > +static irqreturn_t timer_action(int irq, void *data) > { > - /* This slot is unused and hence available for use, if needed > */ > + timer_interrupt(); > return

[RFC V2 PATCH 2/6] powerpc: Implement broadcast timer interrupt as an IPI message

2013-08-14 Thread Preeti U Murthy
From: Srivatsa S. Bhat For scalability and performance reasons, we want the broadcast timer interrupts to be handled as efficiently as possible. Fixed IPI messages are one of the most efficient mechanisms available - they are faster than the smp_call_function mechanism because the IPI handlers ar