On Mon, Jul 13, 2015 at 12:57 PM, Chris Metcalf <cmetcalf@xxxxxxxxxx> wrote: > The existing nohz_full mode makes tradeoffs to minimize userspace > interruptions while still attempting to avoid overheads in the > kernel entry/exit path, to provide 100% kernel semantics, etc. > > However, some applications require a stronger commitment from the > kernel to avoid interruptions, in particular userspace device > driver style applications, such as high-speed networking code. > > This change introduces a framework to allow applications to elect > to have the stronger semantics as needed, specifying > prctl(PR_SET_CPU_ISOLATED, PR_CPU_ISOLATED_ENABLE) to do so. > Subsequent commits will add additional flags and additional > semantics. I thought the general consensus was that this should be the default behavior and that any associated bugs should be fixed. --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
