[Xen-devel] [PATCH 0/4] enhance lock debugging

[Juergen Gross <jgross@xxxxxxxx>]

While hunting a locking problem in my core scheduling series I have
added some debugging aids to spinlock handling making it easier to
find the root cause for the problem.

Making use of the already lock profiling and enhancing it a little
bit produces some really valuable diagnostic data e.g. when a NMI
watchdog is triggering a crash.

Juergen Gross (4):
  xen/spinlocks: in debug builds store cpu holding the lock
  xen: add new CONFIG_SPINLOCK_DEBUG option
  xen: print lock profile info in panic()
  xen: modify lock profiling interface

 tools/libxc/xc_misc.c       |   1 +
 tools/misc/xenlockprof.c    |  17 ++----
 xen/Kconfig.debug           |   8 +++
 xen/common/domain.c         |   4 +-
 xen/common/spinlock.c       | 134 +++++++++++++++++++++++++++++++-------------
 xen/drivers/char/console.c  |   4 +-
 xen/include/public/sysctl.h |  11 ++--
 xen/include/xen/spinlock.h  |  42 ++++++++------
 8 files changed, 142 insertions(+), 79 deletions(-)

-- 
2.16.4


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