[libvirt] [PATCH 0/9] Resolve libvirtd hang on termination with connected long running client

RFC: https://www.redhat.com/archives/libvir-list/2018-January/msg00318.html Adjustments since RFC... Patches 1&2: No change, were already R-B'd Patch 3: Removed code as noted in code review, update commit message Patch 4: From old series removed, see below for more details Patch 9: no change NB: Patches 5-8 and 10 from Nikolay Shirokovskiy <nshirokovskiy(a)virtuozzo.com&gt; are removed as they seemed to not be necessary Replaced the former patch 4 with series of patches to (slowly) provide support to disable new connections, handle removing waiting jobs, causing the waiting workers to quit, and allow any running jobs to complete. As it turns out, waiting for running jobs to complete cannot be done from the virNetServerClose callbacks because that means the event loop processing done during virNetServerRun will not allow any currently long running worker job thread a means to complete. So when virNetDaemonQuit is called as a result of the libvirtd signal handlers for SIG{QUIT|INT|TERM}, instead of just causing virNetServerRun to quit immediately, alter to using a quitRequested flag and then use that quitRequested flag to check for long running worker threads before causing the event loop to quit resulting in libvirtd being able to run through the virNetDaemonClose processing. John Ferlan (9): libvirtd: Alter refcnt processing for domain server objects libvirtd: Alter refcnt processing for server program objects netserver: Remove ServiceToggle during ServerDispose util: Introduce virThreadPoolDrain rpc: Introduce virNetServerQuitRequested rpc: Introduce virNetServerWorkerCount rpc: Alter virNetDaemonQuit processing docs: Add news article for libvirtd issue APPLY ONLY FOR TESTING PURPOSES daemon/libvirtd.c | 43 +++++++++++++++++++++++--------- docs/news.xml | 12 +++++++++ src/libvirt_private.syms | 1 + src/libvirt_remote.syms | 2 ++ src/qemu/qemu_driver.c | 5 ++++ src/rpc/virnetdaemon.c | 45 +++++++++++++++++++++++++++++++++- src/rpc/virnetserver.c | 52 ++++++++++++++++++++++++++++++++++++--- src/rpc/virnetserver.h | 4 +++ src/util/virthreadpool.c | 64 ++++++++++++++++++++++++++++++++++++++++-------- src/util/virthreadpool.h | 2 ++ 10 files changed, 204 insertions(+), 26 deletions(-) -- 2.13.6