From: Marc-André Lureau <marcandre.lur...@redhat.com> Hi,
The following series implement shareable log for vhost-user to support memory tracking during live migration. On qemu-side, the solution is fairly straightfoward since vhost already supports the dirty log, only vhost-user couldn't access the log memory until then. The series includes "vhost user: Add live migration" patches from Thibaut Collet. v5->v6: - rebased - fix protocol feature mask update - add a patch from Thibault Collet using enum for features, and compute mask - add unistd.h linux headers to help building memfd if missing on build host. Hopefully will be useful for other syscalls some day - reorder/merge patches to share-allocate the log only if needed - split the memfd helper to allow to drop the fallback code - allow to call qemu_memfd_free() even if alloc failed - add some missing spaces v4->v5: - rebase on top of last Michael S. Tsirkin PULL request - block live migration if !PROTOCOL_F_LOG_SHMFD - wait for a reply after SET_LOG_BASE - split vhost_set_log_base from the rest of vhost_call refactoring - use a seperate global vhost_log_shm v3->v4: - add the proto negotiation & the migration series - replace the varargs vhost_call() approach for callbacks - only share-allocate when the backend needs it v2->v3: - changed some patch summary - added migration tests - added a patch to replace error message with a trace The development branch I used is: https://github.com/elmarco/qemu branch "vhost-user" Marc-André Lureau (20): configure: probe for memfd linux-headers: add unistd.h util: add linux-only memfd fallback util: add memfd helpers memfd: add fallback for memfd vhost: document log resizing vhost: add vhost_set_log_base op vhost-user: add vhost_user_requires_shm_log() vhost: alloc shareable log vhost-user: send log shm fd along with log_base vhost-user: add a migration blocker vhost: use a function for each call vhost-user: document migration log net: add trace_vhost_user_event vhost-user-test: move wait_for_fds() out vhost-user-test: remove useless static check vhost-user-test: wrap server in TestServer struct vhost-user-test: learn to tweak various qemu arguments vhost-user-test: add live-migration test vhost-user-test: check ownership during migration Michael S. Tsirkin (1): vhost-user: unit test for new messages Thibaut Collet (3): vhost user: add support of live migration vhost user: add rarp sending after live migration for legacy guest vhost-user: use an enum helper for features mask configure | 19 + docs/specs/vhost-user.txt | 63 ++- hw/net/vhost_net.c | 35 +- hw/scsi/vhost-scsi.c | 7 +- hw/virtio/vhost-backend.c | 121 +++- hw/virtio/vhost-user.c | 576 ++++++++++++------- hw/virtio/vhost.c | 102 ++-- include/hw/virtio/vhost-backend.h | 77 ++- include/hw/virtio/vhost.h | 15 +- include/net/vhost_net.h | 1 + include/qemu/memfd.h | 24 + linux-headers/asm-arm/unistd.h | 448 +++++++++++++++ linux-headers/asm-arm64/kvm.h | 37 +- linux-headers/asm-arm64/unistd.h | 16 + linux-headers/asm-mips/unistd.h | 1063 ++++++++++++++++++++++++++++++++++++ linux-headers/asm-powerpc/unistd.h | 392 +++++++++++++ linux-headers/asm-s390/unistd.h | 404 ++++++++++++++ linux-headers/asm-x86/unistd.h | 15 + linux-headers/asm-x86/unistd_32.h | 377 +++++++++++++ linux-headers/asm-x86/unistd_64.h | 330 +++++++++++ linux-headers/asm-x86/unistd_x32.h | 319 +++++++++++ net/vhost-user.c | 34 +- scripts/update-linux-headers.sh | 7 +- tests/vhost-user-test.c | 390 +++++++++++-- trace-events | 3 + util/Makefile.objs | 2 +- util/memfd.c | 129 +++++ 27 files changed, 4673 insertions(+), 333 deletions(-) create mode 100644 include/qemu/memfd.h create mode 100644 linux-headers/asm-arm/unistd.h create mode 100644 linux-headers/asm-arm64/unistd.h create mode 100644 linux-headers/asm-mips/unistd.h create mode 100644 linux-headers/asm-powerpc/unistd.h create mode 100644 linux-headers/asm-s390/unistd.h create mode 100644 linux-headers/asm-x86/unistd.h create mode 100644 linux-headers/asm-x86/unistd_32.h create mode 100644 linux-headers/asm-x86/unistd_64.h create mode 100644 linux-headers/asm-x86/unistd_x32.h create mode 100644 util/memfd.c -- 2.4.3
