On Wed, Oct 16, 2013 at 09:52:14PM +0900, HATAYAMA Daisuke wrote: > This patch set is to allow kdump 2nd kernel to wake up multiple CPUs > even if 1st kernel crashs on some AP. > > Sorry, this patch set have not include in-source documentation > requested by Borislav Petkov yet, but I'll post it later separately, > which would be better to focus on documentation reviewing. > > ChangeLog > > v2 => v3) > > - Change default value of boot_cpu_is_bsp to true. > > - Before executing rdmsr(MSR_IA32_APICBASE), check if the number of > processor family is larger than or equal to 6 in order to avoid > invalid opcode exception on processors where MSR_IA32_APICBASE is > not supported.
Daisuke, Thank you for doing this work. I have back ported these changes to a 2.6.32 based kernel and have tested with nr_cpus=8 and have not seen any problems. The system without these patches wouldn't successfully boot the capture kernel when nr_cpus > 1. thanks Jerry Hoemann > > v1 => v2) > > - Rebased on top of v3.12-rc5. > > - Fix linking time error of boot_cpu_is_bsp_init() in case of > CONFIG_LOCAL_APIC disabled by adding empty static inline function > instead. > > - Fix missing feature check by means of cpu_has_apic macro in > boot_cpu_is_bsp_init() before calling rdmsr_safe(MSR_IA32_APICBASE). > > NOTE: I've checked local apic-present case only; I don't have any > x86 processor without local apic. > > - Add __init annotation to boot_cpu_is_bsp_init(). > > Test > > - built with and without CONFIG_LOCAL_APIC > - tested x86_64 in case of acpi and MP table > > --- > > HATAYAMA Daisuke (2): > x86, apic: Add boot_cpu_is_bsp() to check if boot cpu is BSP > x86, apic: Disable BSP if boot cpu is AP > > > arch/x86/include/asm/mpspec.h | 9 ++++++++- > arch/x86/kernel/acpi/boot.c | 6 +++++- > arch/x86/kernel/apic/apic.c | 35 ++++++++++++++++++++++++++++++++++- > arch/x86/kernel/devicetree.c | 1 + > arch/x86/kernel/mpparse.c | 15 +++++++++++++-- > arch/x86/kernel/setup.c | 2 ++ > arch/x86/platform/sfi/sfi.c | 2 +- > 7 files changed, 64 insertions(+), 6 deletions(-) > > -- > > Thanks. > HATAYAMA, Daisuke > > _______________________________________________ > kexec mailing list > ke...@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec -- ---------------------------------------------------------------------------- Jerry Hoemann Software Engineer Hewlett-Packard/MODL 3404 E Harmony Rd. MS 57 phone: (970) 898-1022 Ft. Collins, CO 80528 FAX: (970) 898-XXXX email: jerry.hoem...@hp.com ---------------------------------------------------------------------------- -- 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/
