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[Qemu-devel] Re: [5694] Reintroduce migrate-to-exec: support (Charles Du
From: |
Thomas Mueller |
Subject: |
[Qemu-devel] Re: [5694] Reintroduce migrate-to-exec: support (Charles Duffy) |
Date: |
Thu, 13 Nov 2008 09:53:26 +0000 (UTC) |
User-agent: |
Pan/0.132 (Waxed in Black) |
On Tue, 11 Nov 2008 16:46:33 +0000, Anthony Liguori wrote:
> Revision: 5694
> http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=5694
> Author: aliguori
> Date: 2008-11-11 16:46:33 +0000 (Tue, 11 Nov 2008)
>
> Log Message:
> -----------
> Reintroduce migrate-to-exec: support (Charles Duffy)
>
> KVM's live migration support included support for exec: URLs, allowing
> system state to be written or received via an arbitrary popen()ed
> subprocess. This provides a convenient way to pipe state through a
> compression algorithm or an arbitrary network transport on its way to
> its destination, and a convenient way to write state to disk; libvirt's
> qemu driver currently uses migration to exec: targets for this latter
> purpose.
>
> This version of the patch refactors now-common code from migrate-tcp.c
> into migrate.c.
i applied this patch to the kvm-79 qemu.
save and restore works with "migration exec:cat >/tmp/vm.state"/"-
incoming exec:cat /tmp/vm.state", altough there is an segfault logged to
syslog:
[265193.983381] kvm[15017]: segfault at 0 ip 0 sp 7fffb85ecaa8 error 14
in kvm[400000+1af000]
my system:
Intel E5420, debian etch, kernel 2.6.26
- Thomas