Messages in this thread | | | Subject | Re: Kexec for v2.5.47 (test feedback) | From | Andy Pfiffer <> | Date | 12 Nov 2002 16:48:30 -0800 |
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On Mon, 2002-11-11 at 23:22, Eric W. Biederman wrote: > > On Mon, 2002-11-11 at 10:15, Eric W. Biederman wrote: > > > kexec is a set of system calls that allows you to load another kernel > > > from the currently executing Linux kernel. > >
> > Results on my usual problem machine: > > > > # ./kexec-1.5 ./kexec_test-1.5 > > Shutting down devices > > Debug: sleeping function called from illegal context at include/asm/semaphore.h9 > > > > Call Trace: [<c011a698>] [<c0216193>] [<c012b165>] [<c0132dec>] [<c0140357> > > Hmm. I wonder what is doing that. Do you have the semaphore problem on a normal reboot?
No clue as of yet. I do not see this information during a normal reboot.
> > Starting new kernel > > > > kexec_test 1.5 starting... > > eax: 0E1FB007 ebx: 00001078 ecx: 00000000 edx: 00000000 > > esi: 00000000 edi: 00000000 esp: 00000000 ebp: 00000000 > > idt: 00000000 C0000000 > > gdt: 00000000 C0000000 > > Switching descriptors. > > Descriptors changed. > > Legacy pic setup. > > In real mode. > > <hang> > > Yep it works until it runs into your apics that are not shutdown. > That looks like one of the next things to tackle.
I used the linux-2.5.44.x86kexec-hwfixes.diff (it applied cleanly to pure 2.5.47 + kexec); I'll try your updated version soon if there are any major differences.
> The challenge is with the apic shutdown is that currently the apics are not > in the device tree so that needs to happen before I can submit a good version > for 2.5.x > > > > Confirming some earlier suspicions: > > CONFIG_SMP=y > > CONFIG_X86_GOOD_APIC=y > > CONFIG_X86_LOCAL_APIC=y > > CONFIG_X86_IO_APIC=y > > > > Last time I tried to run a UP kernel (and no APIC support) on this system > > it wasn't pretty. I'll add that to my list of combinations to try.
On this same system, I reconfigured and tried this: # CONFIG_SMP is not set CONFIG_X86_GOOD_APIC=y # CONFIG_X86_UP_APIC is not set # CONFIG_X86_LOCAL_APIC is not set # CONFIG_X86_IO_APIC is not set
None of the "ordinary" APIC initialization messages were output during the regular BIOS->LILO boot of this kernel.
Using kexec on this kernel to run kexec_test-1.5 stops in the same way: # ./kexec-1.5 --debug ./kexec_test-1.5 Shutting down devices Debug: sleeping function called from illegal context at include/asm/semaphore.h9Call Trace: [<c0113f7c>] [<c01ec123>] [<c0120af2>] [<c0130d5d>] [<c0130d5d> Starting new kernel kexec_test 1.5 starting... eax: 0E1FB007 ebx: 00001078 ecx: 00000000 edx: 00000000 esi: 00000000 edi: 00000000 esp: 00000000 ebp: 00000000 idt: 00000000 C0000000 gdt: 00000000 C0000000 Switching descriptors. Descriptors changed. Legacy pic setup. In real mode. <hang>
So, does this information suggest looking somewhere other than APIC shutdown?
Andy
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