Messages in this thread | | | Date | Wed, 30 Oct 2013 18:58:13 -0600 | From | jerry.hoemann@hp ... | Subject | Re: [PATCH v4 0/3] x86, apic, kexec: Add disable_cpu_apic kernel parameter |
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On Wed, Oct 23, 2013 at 09:05:06AM +0900, HATAYAMA Daisuke wrote: > >> > >>- Rebased on top of v3.12-rc6 > >> > >>- Basic design has been changed. Now users need to figure out initial > >> APIC ID of BSP in the 1st kernel and configures kernel parameter for > >> the 2nd kernel manually using disable_cpu_apic kernel parameter to > >> be newly introduced in this patch set. This design is more flexible > >> than the previous version in that we no longer have to rely on > >> ACPI/MP table to get initial APIC ID of BSP. > > > > > >Do you literally mean a human at each boot will have to configure > >the kdump configuration files for passing disable_cpu_apic? > >Or do you envision the setting of disable_cpu_apic being put into > >the kdump initialization scripts? > > > >thanks > > > >Jerry > > Nearer to the former case, but this is not what a human should do. It's > a cumbersome task. I think, on fedora/RHEL system for example, kdump > service should check at each boot automatically. > > HATAYAMA, Daisuke
Daisuke,
Are you planning on making changes to the kexec tools to automate the setting of disable_cpu_apic to the capture kernel? Or do you know someone who is planning this?
I back ported the kernel side changes to a 4.2.32 based kernel. I tested the patch on a prototype system which exhibits a stable initial_apic_id for CPU 0. While not something that would be suitable for customers, it does allow me to test the kernel portion of the patch.
I will report the results of the testing later this week.
Thanks
Jerry
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---------------------------------------------------------------------------- Jerry Hoemann Software Engineer Hewlett-Packard/MODL
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