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Re: [Xen-devel] Re: Adding PTE Flag during Page Fault
Thanks for the suggestion Keir, unfortunately my kernel lacks the option
for kexec, despite the fact that all the source files are included.
Anyway, I was able to get the information I need by passing certain args
to the xen kernel via grub:
kernel /xen.gz noreboot console=vga vga=keep xencons=tty
Using this output I managed to get my stuff working this morning also.
I was surprised to learn that of the ~90K pages saved (for a 380MB
memory image) only ~1500 are needed for the system to start up and
continue running. Granted every time something is done another 10-20
pages get loaded, the fact that less than 2% only need to be present to
start the VM again is crazy. This means that only ~6MB of the memory
image needs to be present to resume.
Keir Fraser wrote:
> On 14/4/07 22:29, "Joe Laws" <jlaws@xxxxxxxxxxxxxx> wrote:
>> Now it just causes Xen to crash and my computer to reboot.
>> Unfortunately I can only see the output to the log by doing xm dmesg,
>> which gets cleared on every reboot. Are there any efficient techniques
>> to get the latest xm dmesg output to file before the system crashes?
> You can use kdump (basically chain boot into a special crash-dump Linux
> kernel with block or net drivers which will scrape memory for things like
> Xen heap and Xen logging output).
> -- Keir
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