With this series applied I was able to perform Live Update of Xenstore running in a PVH stubdom.
This series is based on a related Mini-OS patch series AND it needs the Mini-OS commit id updated accordingly in Config.mk. One relevant change in this series is how the Xenstore state is being read after activating the new binary. Instead of using mmap() the state records are read one by one via fread(). This might have a small performance impact for the daemon live update case, but it should be neglectable. Juergen Gross (9): stubdom: configure kexec for PVH Xenstore stubdom tools/xenstore: perform kexec for stubdom live update libevtchn: add O_CLOEXEC support for Mini-OS libxengnttab: set the cloexec flag on Mini-OS xenstored: use read() instead of mmap() for reading live update state xenstored: don't use xenevtchn_fdopen() in stubdom tools/libxenevtchn: add xenevtchn_bind() under Mini-OS xenstored: rebind event channels after live update in stubdom tools/xenstored: make stubdom_init() live update aware stubdom/xenstorepvh-minios.cfg | 2 + tools/include/xenevtchn.h | 11 ++++ tools/libs/evtchn/minios.c | 23 +++++++-- tools/libs/gnttab/minios.c | 1 + tools/xenstored/core.c | 5 +- tools/xenstored/core.h | 13 ++++- tools/xenstored/domain.c | 25 +++++---- tools/xenstored/domain.h | 2 +- tools/xenstored/lu.c | 93 +++++++++++++++++++++------------- tools/xenstored/lu_minios.c | 33 +++++++++++- tools/xenstored/minios.c | 22 ++++++-- tools/xenstored/posix.c | 10 ++++ 12 files changed, 183 insertions(+), 57 deletions(-) -- 2.43.0
