[RFC PATCH v3 0/4] Separate thread for VM migration

From: Umesh Deshpande <udeshpan@redhat.com>
To: kvm@vger.kernel.org
Cc: quintela@redhat.com, mtosatti@redhat.com, pbonzini@redhat.com,
	Umesh Deshpande <udeshpan@redhat.com>
Subject: [RFC PATCH v3 0/4] Separate thread for VM migration
Date: Thu, 11 Aug 2011 11:32:40 -0400	[thread overview]
Message-ID: <cover.1313076455.git.udeshpan@redhat.com> (raw)

Following patch series 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 (4):
  separate thread for VM migration
  synchronous migrate_cancel
  lock to protect memslots
  separate migration bitmap

 arch_init.c         |   26 ++++++++++----
 buffered_file.c     |  100 +++++++++++++++++++++++++++++++++------------------
 buffered_file.h     |    4 ++
 cpu-all.h           |   39 ++++++++++++++++++++
 cpus.c              |   12 ++++++
 exec.c              |   74 +++++++++++++++++++++++++++++++++++++
 hw/hw.h             |    5 ++-
 migration.c         |   50 ++++++++++++--------------
 migration.h         |    6 +++
 qemu-common.h       |    2 +
 qemu-thread-posix.c |   10 +++++
 qemu-thread.h       |    1 +
 savevm.c            |   31 +++++++++++-----
 13 files changed, 280 insertions(+), 80 deletions(-)

-- 
1.7.4.1