[Xen-devel] [PATCH v3 00/10] libxl: event: Fix hang for some applications

[Ian Jackson <ian.jackson@xxxxxxxxxxxxx>]

The meat here, including a description of the bug, is in:
  libxl: event: Fix hang when mixing blocking and eventy calls

This is all now Reviewed-by and Tested-by George, so it is ready to be
committed.  But I will be away for a bit soon and reverting something
of this form is probably undesirable.  So I will commit this in
something over a week (assuming no further comments arise).

The changes here from v2 are only to two of the commit messages
(marked m in the list below).

I am not sure whether this series is a backport candidate.  It is not
impossible that the bug we are fixing here is affecting (say) libvirt.
But if so presumably not in a significant way as we haven't seen
reports.  So even though this is a bugfix, I'm sceptical.

Ian Jackson (10):
   libxl: event: Rename poller.fds_changed to .fds_deregistered
   libxl: event: Rename ctx.pollers_fd_changed to .pollers_active
   libxl: event: Introduce CTX_UNLOCK_EGC_FREE
   libxl: event: Make LIBXL__EVENT_DISASTER take a gc, not an egc
 m libxl: event: Make libxl__poller_wakeup take a gc, not an egc
   libxl: event: Fix hang when mixing blocking and eventy calls
   libxl: event: poller pipe optimisation
   libxl: event: Break out baton_wake
   libxl: event: Fix possible hang with libxl_osevent_beforepoll
 m libxl: event: Move poller pipe emptying to the end of afterpoll

 tools/libxl/libxl.c          |   4 +-
 tools/libxl/libxl_aoutils.c  |   2 +-
 tools/libxl/libxl_disk.c     |   4 +-
 tools/libxl/libxl_domain.c   |   2 +-
 tools/libxl/libxl_event.c    | 286 +++++++++++++++++++++++++++++++++++--------
 tools/libxl/libxl_fork.c     |  17 ++-
 tools/libxl/libxl_internal.h |  54 +++++---
 7 files changed, 290 insertions(+), 79 deletions(-)

-- 
2.11.0


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