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

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 for use,

[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 srivatsa.b...@linux.vnet.ibm.com 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