[RFC PATCH 0/2] A separate thread for VM migration

Umesh Deshapnde
2011-07-22T19:58:14Z

Following patch deals with VCPU and iothread starvation during the migration of
a guest. Currently the iothread is responsible for performing the guest
migration. It holds qemu_mutex during the migration and doesn't allow VCPU to
enter the qemu mode and delays its return to the guest. The guest migration,
executed as an iohandler also delays the execution of other iohandlers. In the
following patch series, the migration has been moved to a separate thread to reduce the
qemu_mutex contention and iohandler starvation.

Umesh Deshpande (2):
new clock for migration routine
separate thread for VM migration

arch_init.c | 14 ++++++++++--
buffered_file.c | 12 ++++++----
exec.c | 4 +++
migration-tcp.c | 18 ++++++++--------
migration-unix.c | 7 ++---
migration.c | 59 ++++++++++++++++++++++++++++++-----------------------
migration.h | 4 +-
qemu-timer.c | 29 ++++++++++++++++++++++++-
qemu-timer.h | 3 ++
9 files changed, 99 insertions(+), 51 deletions(-)

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1.7.4.1