[PATCH 0/4 v4] max_threadx handling

[Heinrich Schuchardt]

In fork_init a division by zero may occur.

In the first patch the calculation of max_threads is moved from fork_init
to a new separate function.

The incorrect calculation of max threads is addressed in the
second patch.

Furthermore max_threads is checked against FUTEX_TID_MASK.

The third patch addresses max_threads being set by writing to
/proc/sys/kernel/threads-max. The same limits are applied as
in fork_init. 

The fourth patch uses a callback function to update max_threads when
a memory hotplug event occurs.

New in version 4:
  Separate of refactoring and correction into separate patches
  (as requested by Ingo Molnar)
  Remove redundant argument of fork_init

New in version 3:
  Determination of max_threads moved to separate function.
  Handling of /proc/sys/kernel/threads-max
  Handling of memory hotplugging.

Heinrich Schuchardt (4):
  kernel/fork.c: new function for max_threads
  kernel/fork.c: avoid division by zero
  kernel/sysctl.c: threads-max observe limits
  kernel/fork.c: memory hotplug updates max_threads

 include/linux/sysctl.h |   3 ++
 init/main.c            |   4 +-
 kernel/fork.c          | 112 +++++++++++++++++++++++++++++++++++++++++--------
 kernel/sysctl.c        |   6 +--
 4 files changed, 102 insertions(+), 23 deletions(-)

-- 
2.1.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/