Messages in this thread | | | Subject | Re: [Fastboot] Re: kdump on non-boot cpu | From | (Eric W. Biederman) | Date | 03 Feb 2005 02:58:02 -0700 |
| |
Itsuro Oda <oda@valinux.co.jp> writes:
> Hi, > > This is not for kdump but an experience of our project(mkdump). > The dump kernel(not SMP config) boot hangs if machine_kexec() > excutes on non-boot CPU on x86_64 platform.
?? x86_64 is Opteron cpu, amd64, Intel cpu? Are the kernels running in 32bit or 64bit mode. I'm guessing SMP Opterons running in 32bit mode.
Anyway one thing I want to do is actually drop the apic shutdown code altogether in this code path. I threw it in there to ease the transition from the old code base to the new, but if that code is causing issues.... So this is probably a good time to start testing that.
> We don't found why. (Please let me know if you know why.) > but fix that the boot-cpu excutes machine_kexec() in the nmi handler. > (It becomes OK after that)
My best hunch is that your UP kernel is not getting interrupts. Any chance on getting a serial console boot log?
I suspect it can be made to work if you compile your UP kernel with IOAPIC support. I do know the table parsers no longer complain about the configuration.
Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |