On Fri, 2012-09-28 at 00:12 +0530, Srivatsa S. Bhat wrote: > On 09/27/2012 04:16 AM, Suresh Siddha wrote: > > > > No. irq_set_affinity() > > > > Um? That takes the updated/changed affinity and sets data->affinity to > that value no? You mentioned that probably the intention of the original > code was to preserve the user-set affinity mask, but still change the > underlying interrupt routing. Sorry, but I still didn't quite understand > what is that part of the code that achieves that.
For the HW routing to be changed we AND it with cpu_online_map and use that for programming the interrupt entries etc. The user-specified affinity still has the cpu that is offlined. And when the cpu comes online and if it is part of the user-specified affinity, then the HW routing can be again modified to include the new cpu. hope this clears it! thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
