On 04/21/2015 05:44 PM, Paul E. McKenney wrote: > AUTONUMA > > The Linux kernel's autonuma facility supports migrating both > memory and processes to promote NUMA memory locality. It was > accepted into 3.13 and is available in RHEL 7.0 and SLES 12. > It is enabled by the Kconfig variable CONFIG_NUMA_BALANCING. > > This approach uses a kernel thread "knuma_scand" that periodically > marks pages inaccessible. The page-fault handler notes any > mismatches between the NUMA node that the process is running on > and the NUMA node on which the page resides.
Minor nit: marking pages inaccessible is done from task_work nowadays, there no longer is a kernel thread. > The result would be that the kernel would allocate only migratable > pages within the CCAD device's memory, and even then only if > memory was otherwise exhausted. Does it make sense to allocate the device's page tables in memory belonging to the device? Is this a necessary thing with some devices? Jerome's HMM comes to mind... -- All rights reversed -- 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/
