Hello, I installed OpenSuse 13.2 on IPC277E with the native kernel 13.16.6. After that I downloaded kernel 3.18.25 and the relative RT PREEMPT PATCH. I done the patch. I copied from boot directory the file config-3.16.6-2-desktop to usr/src/linux-3.18.25. I renamed it to .config. And then I started make menuconfig and at this point I got some problems. I didn’t find setting written In the howto: The most default configurations here are ok as-they-are. However you should make sure that you have enable CONFIG_PREEMPT_RT activated the High-Resolution-Timer Option (Attention, the amount of supported platforms by the HR timer is still very limited. Right now the option is only supported on x86 systems, PowerPC and ARM Support are however in queue.) disabled all Power Management Options like ACPI or APM (not all ACPI functions are "bad", but you will have to check very carefully to find out which function will affect your real time system. Thus it's better to simply disable them all if you don't need them. APM, however, is a no-go.) NOTE: Since rt patch 2.6.18-rt6 you will probably have to activate ACPI option to activate high resolution timer. Since the TSC timer on PC platforms, as used in the previous versions, are now marked as unsuitable for hrt mode due to many lacks of functionalities and reliabilities, you will need i.E. pm_timer as provided by ACPI to use as clock source. To activate the pm_timer, you can just activate the ACPI_SUPPORT in menuconfig and deactivate all other sub modules like "fan", "processor" or "button". If you have an old pc, which lacks ACPI support, you might have problems using the high resolution timer. Also in the website there is another tips for patch configuration: Kernel 3.x: CONFIG_PREEMPT=y CONFIG_PREEMPT_RT_BASE=y CONFIG_PREEMPT_RT_FULL=y But I didn’t find also them. Do you have a list of changing to do in menuconfig for a kernel similar to 3.18.25? Thanks! Simone Pietro Lossani -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
