Based-on: <20221011215559.602584-1-pet...@redhat.com> This whole set is based on the whole set of preempt-full mode being applied first here:
https://lore.kernel.org/r/20221011215559.602584-1-pet...@redhat.com I also picked up the latest version from Manish on fixing multifd counterpart of the problem, here (which are the initial two patches): https://lore.kernel.org/r/20221123172735.25181-1-manish.mis...@nutanix.com One trivial change is to fix RDMA builds for patch 1 there. I verified that I can trigger disordered connections with preempt mode postcopy (1 out of a few attemps), which can cause migration to hang during precopy phase, if e.g. I set the NIC packet loss rate to 50%. So now with all the 5 patches applied we should fix all the migration disorder issue on channel creation. Patch 3 is IMHO a cleanup that I'd think good to have even without patch 4/5. Patch 5 actually fixes the ordering issue. For each of the patch, please refer to the commit message and comments in-code. Any comment welcomed. A side note to Juan: logically it should apply cleanly to your -next tree as long as Manish's patches are not there - because they're also included here with a fix to RDMA builds. Peter Xu (3): migration: Rework multi-channel checks on URI migration: Add a semaphore to count PONGs migration: Postpone postcopy preempt channel to be after main manish.mishra (2): io: Add support for MSG_PEEK for socket channel migration: check magic value for deciding the mapping of channels chardev/char-socket.c | 4 +- include/io/channel.h | 6 + io/channel-buffer.c | 1 + io/channel-command.c | 1 + io/channel-file.c | 1 + io/channel-null.c | 1 + io/channel-socket.c | 17 ++- io/channel-tls.c | 1 + io/channel-websock.c | 1 + io/channel.c | 16 ++- migration/channel-block.c | 1 + migration/channel.c | 45 ++++++++ migration/channel.h | 5 + migration/migration.c | 164 +++++++++++++++++++--------- migration/migration.h | 15 ++- migration/multifd.c | 24 +--- migration/multifd.h | 2 +- migration/postcopy-ram.c | 36 +++--- migration/postcopy-ram.h | 6 +- migration/rdma.c | 1 + migration/savevm.c | 6 +- scsi/qemu-pr-helper.c | 2 +- tests/qtest/tpm-emu.c | 2 +- tests/unit/test-io-channel-socket.c | 1 + util/vhost-user-server.c | 2 +- 25 files changed, 254 insertions(+), 107 deletions(-) -- 2.37.3
