Re: [Libguestfs] Double fault panic in L2 upon v2v conversion
On Thu, Jan 16, 2014 at 11:25:10PM +0200, Rom Freiman wrote:
Thanks Richard for a fast reply.
Yes, indeed, im working on a nested environment. I try to run v2v inside a
VM (L1) and to create an L2 by the conversion process. And on Intel. As I
wrote, it fails once in few times, mainly when there is a memory pressure
on L0.
Kashyap, can you please share your experience? Why should it crash during
nested conversion. I'm not too familiar with libguestfs logic - maybe you
can point for me, according to the logs, at what stage of the conversion
the failure happens.
I can make a general comment here: libguestfs relies on KVM/qemu/etc
being reliable. If KVM/qemu/etc is broken, then libguestfs isn't
going to work.
If you can't disable nested KVM and don't want to fix it, then you
have two other options:
(1) Patch libguestfs to force qemu to use TCG:
In src/launch-direct.c:
if (qemu_supports (g, data, "-machine")) {
ADD_CMDLINE ("-machine");
- ADD_CMDLINE ("accel=kvm:tcg");
+ ADD_CMDLINE ("accel=tcg");
} else {
(2) Take a look at the UML backend for libguestfs:
http://libguestfs.org/guestfs.3.html#user-mode-linux-backend
Rich.
--
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