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Re: [libvirt] [PATCH] qemu: allow blkstat/blkinfo calls during migration



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 redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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