linux-kernel - [PATCH 0/3 v3] kernel/fork.c max

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Message-Id: <1424557146-29965-1-git-send-email-xypron.glpk@gmx.de>
Date:	Sat, 21 Feb 2015 23:19:03 +0100
From:	Heinrich Schuchardt <xypron.glpk@....de>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Joe Perches <joe@...ches.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...nel.org>,
	Vladimir Davydov <vdavydov@...allels.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Kees Cook <keescook@...omium.org>,
	David Rientjes <rientjes@...gle.com>,
	Johannes Weiner <hannes@...xchg.org>,
	"David S. Miller" <davem@...emloft.net>,
	Andy Lutomirski <luto@...capital.net>,
	Michael Marineau <mike@...ineau.org>,
	Aaron Tomlin <atomlin@...hat.com>,
	Prarit Bhargava <prarit@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jens Axboe <axboe@...com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Rik van Riel <riel@...hat.com>,
	Davidlohr Bueso <dave@...olabs.net>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-kernel@...r.kernel.org,
	Heinrich Schuchardt <xypron.glpk@....de>
Subject: [PATCH 0/3 v3] kernel/fork.c max_thread handling

In fork_init a division by zero may occur. This is addressed in the
first patch.

Furthermore max_threads is checked against FUTEX_TID_MASK._

The calculation of max_threads is moved to a separate function.

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

The third patch uses a callback function to updated max_thread when
a memory hotplug event occurs.

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 (3):
  kernel/fork.c: avoid division by zero
  kernel/sysctl.c: threads-max observe limits
  kernel/fork.c: memory hotplug updates max_threads

 kernel/fork.c   | 112 ++++++++++++++++++++++++++++++++++++++++++++++++--------
 kernel/sysctl.c |   7 ++--
 2 files changed, 100 insertions(+), 19 deletions(-)

-- 
2.1.4

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