From: Prasad Pandit <p...@fedoraproject.org> Hello,
* Currently Multifd and Postcopy migration can not be used together. QEMU shows "Postcopy is not yet compatible with multifd" message. When migrating guests with large (100's GB) RAM, Multifd threads help to accelerate migration, but inability to use it with the Postcopy mode delays guest start up on the destination side. * This patch series allows to enable both Multifd and Postcopy migration together. In this, Precopy and Multifd threads work during the initial guest (RAM) transfer. When migration moves to the Postcopy phase, Precopy and Multifd threads on the source side stop sending data on their channels. Instead Postcopy threads on the destination start to request pages from the source side. * This series introduces magic value (4-bytes) to be sent on the Postcopy channel. It helps to differentiate channels and properly setup incoming connections on the destination side. Thank you. --- Prasad Pandit (5): migration/multifd: move macros to multifd header migration/postcopy: magic value for postcopy channel migration: remove multifd check with postcopy migration: refactor ram_save_target_page functions migration: enable multifd and postcopy together migration/migration.c | 73 ++++++++++++++++++++++++---------------- migration/multifd.c | 4 --- migration/multifd.h | 5 +++ migration/options.c | 8 ++--- migration/postcopy-ram.c | 7 ++++ migration/postcopy-ram.h | 3 ++ migration/ram.c | 54 ++++++++++++----------------- 7 files changed, 83 insertions(+), 71 deletions(-) -- 2.47.0
