[libvirt] [PATCH] qemu: allow blkstat/blkinfo calls during migration
Eric Blake
eblake at redhat.com
Fri May 13 23:05:14 UTC 2011
On 05/13/2011 04:11 AM, Federico Simoncelli wrote:
> Originally most of libvirt domain-specific calls were blocking
> during a migration.
> A new mechanism to allow specific calls (blkstat/blkinfo) to be
> executed in such condition has been implemented.
> In the long term it'd be desirable to get a more general
> solution to mark further APIs as migration safe, without needing
> special case code.
>
> * src/qemu/qemu_migration.c: add some additional job signal
> flags for doing blkstat/blkinfo during a migration
> * src/qemu/qemu_domain.c: add a condition variable that can be
> used to efficiently wait for the migration code to clear the
> signal flag
> * src/qemu/qemu_driver.c: execute blkstat/blkinfo using the
> job signal flags during migration
> ---
> src/qemu/qemu_domain.c | 13 ++++++
> src/qemu/qemu_domain.h | 9 ++++
> src/qemu/qemu_driver.c | 103 ++++++++++++++++++++++++++++++++-------------
> src/qemu/qemu_migration.c | 38 ++++++++++++++++-
> 4 files changed, 131 insertions(+), 32 deletions(-)
ACK; but pending danpb's commits actually going in.
--
Eric Blake eblake at redhat.com +1-801-349-2682
Libvirt virtualization library http://libvirt.org
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