kexec - into same kernel 2.6.14 hangs
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|Hi All -I have a router box on which I am trying to develop kexec based crash dump collection as its very useful for us to get the dump from customer sites where there is no console.|
This is linux 2.6.14 based.
I am trying to do kexec into the same kernel(no separate dump capturing kernel).
I have kexec-tools and the kdump patch (kernel compiled with modified config).
Before I put my question, here is the set up details:
-- We have SMP support with 2 CPUs.
-- It is i386 based, so I believe it is
relocatable, and I dont need to modify the CONFIG_PHYSICAL, it is pointing
to 0x100000, so I leave it as it is.
-- I have enabled all the required in config
-- I am using the same kernel for collecting dump information as well
(so I have only one kernel image).
-- I have added crashkernel=64M@16M to
my grub.conf and I am able to allocate 64MB space for the crash kernel.
cat /proc/iomem shows this.
-- Before I do kexec -p for panic, I am trying to test with kexec -l and kexec -e,
if I can boot with the crash kernel
I do the following command from my root directory(/) where the
kexec -l system.bzImage --append= "1 irqpoll maxcpus=1 reset_devices root=/dev/hda2"
after that kexec -e
I get the message:
Starting new kerneland it hangs after that. I have to do hard reboot of the router box.
So looking at some of the mailing lists, I have added --console-serial --debug,then I get :
I'm in purgatory
Embedded BIOS Debugger Invalid Opcode Trap
Though I am skeptical about this debug, IMO, I must be missing something for
creating crash kernel.
May be like is allocating 64MB sufficient ? or Can I have the same bzImage
which can boot normally and also with kexec fast boot ?
Your suggestions will be of great help.
Please let me know if any additional information is needed.
Please cc me as I'm not subscribed to the list.
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