On Mon, 2007-07-30 at 15:34 -0400, Brad Hinson wrote:
> Check out this presentation on linuxvm.org:
>
> Help! My (Virtual) Penguin Is Sick!
> http://linuxvm.org/present/SHARE108/S9248ps.pdf
>
> There's a section on VMDUMP, which will give you a kernel memory dump.
> You'll need to convert it using 'vmconvert', which is available in the
> s390utils package. This is assuming you're using DASD. If it's a
> zFCP-only setup, the process is a little different.
Alternatively you can use DASD dump, which is included in zipl.
To prepare a DASD dump disk you have to do the following:
1. Find/Create a DASD partition, which at least as big as
your guest memory
2. Issue zipl: # zipl -d /dev/dasdxxx<partnumber>
To create the dump, you have to do the following on the VM console:
1. #cp cpu all stop
2. #cp store status
3. #cp i <devno of DASD dump device>
--> Wait for disabled wait psw message, which indicates that
the dump process completed.
Then ipl your Linux again. To copy the dump into your filesystem
issue:
# zgetdump /dev/dasdxxx<partnumber> > mydump
You can find more information in the dump tools book under:
http://download.boulder.ibm.com/ibmdl/pub/software/dw/linux390/docu/l26bdt01.pdf
Michael
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