On Wed, 2008-09-24 at 04:58 -0500, Milton Miller wrote: > The per-interrupt mask and unmask calls have to go through RTAS, a > single-threaded global context, which in addition to increasing > path length will really limit scalability. The interrupt controller > poll and reject facilities are accessed through hypervisor calls > which are comparable to a fast syscall, and parallel to all cpus.
Note also that the XICS code thus assumes, iirc, as does the cell IIC code, that eoi is called on the -same- cpu that fetched the interrupt initially. That assumption can be broken with IRQ threads no ? Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
