Re: [libvirt] [PATCH v3 0/7] qemu: Add support for -incoming defer

On Wed, Nov 25, 2015 at 10:29:32AM +0100, Jiri Denemark wrote: > Traditionally, we pass incoming migration URI on QEMU command line, > which has some drawbacks. Depending on the URI QEMU may initialize its > migration state immediately without giving us a chance to set any > additional migration parameters (this applies mainly for fd: URIs). For > some URIs the monitor may be completely blocked from the beginning until > migration is finished, which means we may be stuck in qmp_capabilities > command without being able to send any QMP commands. > > QEMU solved this by introducing "defer" parameter for -incoming command > line option. This will tell QEMU to prepare for an incoming migration > while the actual incoming URI is sent using migrate-incoming QMP > command. Before calling this command we can normally talk to the > monitor and even set any migration parameters which will be honored by > the incoming migration. > > Jiri Denemark (7): > qemu: Introduce qemuProcessInit > qemu: Introduce qemuProcessLaunch > qemu: Introduce qemuProcessFinishStartup > qemu: Separate incoming URI generation from qemuMigrationPrepareAny > qemu: Kill QEMU process if Prepare phase fails > qemu: Skip starting NBD servers for offline migration > qemu: Use qemuProcessLaunch in migration Prepare phase > > src/qemu/qemu_migration.c | 247 +++++++++++++---------- > src/qemu/qemu_process.c | 489 +++++++++++++++++++++++++++++----------------- > src/qemu/qemu_process.h | 20 ++ > 3 files changed, 466 insertions(+), 290 deletions(-) ACK series