On Wed, Dec 1, 2010 at 01:34, Raoufehsadat Hashemian Harandi <rhashem@xxxxxxxxxxx> wrote: Hi, please don't do top posting :) > This(http://lxr.linux.no/linux+v2.6.36/Documentation/ia64/IRQ-redir.txt) > should be the next step after finding the solution for the first problem > (that is just using core0) !!! :D I don't exactly understand your statement above. Could you please elaborate? > I found something which is quite related > (http://www.alexonlinux.com/smp-affinity-and-proper-interrupt-handling-in-li > nux ) this article says that it may not be possible to change irq mask in > the systems with CONFIG_HOTPLUG_CPU enabled! Hmmmmm well, if that so...then....to disable it, based on the related help message: Symbol: HOTPLUG_CPU [=y] â Type : boolean â Prompt: Support for hot-pluggable CPUs â Defined at arch/x86/Kconfig:1632 â Depends on: SMP [=y] && HOTPLUG [=y] â Location: â -> Processor type and features â Selected by: PM_SLEEP_SMP [=y] && SMP [=y] && (ARCH_SUSPEND_POSSIBLE [=y] || ARCH_HIBERNATION_POSSIBLE [=y]) && PM_SLEEP [=y] so, you have to find those 5 kernel config first and one of them must be made as either "m" (module) or "n" (not compiled at all). Your call... > Now I have 3 problems: > > 1) I cannot find out the relationship between CONFIG_HOTPLUG_CPU and irq > affinity. /me too.....IMHO NUMA factor is more logical to have influence > 2) I only have problem with eth0 and eth1 ( for example for the timer > interrupt I can change the mask and it is effective! Although it only uses > the first enabled core in the mask, which is related to IA64 feature) maybe they are hooked internally (somewhere somehow, either in the driver or APIC) to certain CPU core? > 3) I don`t know how to disable CONFIG_HOTPLUG_CPU ! Please kindly see above.... -- regards, Mulyadi Santosa Freelance Linux trainer and consultant blog: the-hydra.blogspot.com training: mulyaditraining.blogspot.com -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
