2010/10/24 Peter Pastor <[email protected]>: > Hey Gilles, > I am in the process to configure the xenomai kernel as you suggested. > I found and disabled the options that you suggested (NUMA, SPARSEMEM, > SECCOMP, AUDITSYSCALL, KPROBES, FTRACE, SELINUX), However, I could not > disable SPARSEMEM. Searching for SPARSEMEM in the kernel configuration > simply says "Symbol: SPARSEMEM [=y]" and does not give me any further info. > Can you tell me how to disable it ?
SPARSEMEM may be a dependence for other options. If you look into the mm/Kconfig file http://lxr.linux.no/#linux+v2.6.32/mm/Kconfig#L103 you may discover which options you have may need SPARSEMEM. For example the CONFIG_MEMORY_HOTPLUG depends on SPARSEMEM. > Also, I disabled NUMA even though the info states "For 64-bit this is > recommended if the system is Intel Core i7 (or later), AMD Opteron, or > EM64T" and my system is a 64bit, with 8 Intel Xeon cores. Hope that is ok... NUMA stands for Non Uniform Memory Access essentially it is for multiprocessor machine which have a memory layout which is not "symmetric" (aka Uniform) with respect to each processor. You have some "pictured" example of NUMA systems on the HWLOC project http://www.open-mpi.org/projects/hwloc/ http://www.open-mpi.org/projects/hwloc/doc/v1.0.2/#examples Now I really don't know if enabling NUMA handling is mandatory for NUMA systems I guess yuo could disable NUMA handling at kernel level but yuo may get performance weirdness because the kernel is not aware of the NUMA nature. This is pure guess, I let others give you a more "secure" answer to this. > Also, I found the following option which is currently > enabled, CONFIG_X86_REROUTE_FOR_BROKEN_BOOT_IRQS. The info states "Reroute > for broken boot IRQs". Maybe that something I could switch off and see what > happens ?? > I attached the config and I will let you know how it goes. > THANK you so much, > peter -- Erk Membre de l'April - « promouvoir et défendre le logiciel libre » - http://www.april.org _______________________________________________ Xenomai-help mailing list [email protected] https://mail.gna.org/listinfo/xenomai-help
