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Message-ID: <20100809221447.GA24358@linux.vnet.ibm.com> Date: Mon, 9 Aug 2010 15:14:47 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: linux-kernel@...r.kernel.org Cc: mingo@...e.hu, laijs@...fujitsu.com, dipankar@...ibm.com, akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca, josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com, tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org, Valdis.Kletnieks@...edu, dhowells@...hat.com, eric.dumazet@...il.com Subject: [PATCH tip/core/rcu 0/N] Additional RCU commits queued for 2.6.37 Hello! This patchset shows additional patches queued for 2.6.37, over and above those posted at http://lkml.org/lkml/2010/7/14/334. These are all minor fixes, with the exception of patch #8, which adds TINY_PREEMPT_RCU. The patches are as follows: 1. Remove the rcu_head initialization macros (from Mathieu Desnoyers). This patch can move forward now that all uses of these macros have been removed from mainline. 2. Update documentation to note the demise of the rcu_head initialization macros. 3. Fix kernel-locking.tmpl docbook documentation, which was still using the now-ancient three-argument version of call_rcu(). 4. Allow RCU's CPU stall-warning messages to be controlled via sysfs. 5. Now that TINY_RCU has been in-tree for a few releases, adjust the configuration so that TINY_RCU is mandatory for kernels built with !SMP and !PREEMPT. Once TINY_PREEMPT_RCU has gained a similar level of experience, !SMP code will be eliminated from TREE_RCU. 6. Allow kernels to be built such that RCU CPU stall warnings are suppressed at boot time. Patch #4 above allows them to be manually re-enabled once the system has booted. 7. Updates the RCU_FANOUT message to take commit cf244dc01bf68 into account. This commit added a fourth level to TREE_RCU. 8. Add TINY_PREEMPT_RCU, allowing reduced memory footprint for UP builds of preemptible RCU. This is a cleaned-up version of the patch posted at http://lkml.org/lkml/2010/7/21/364. 9. The "It is illegal to block while in an RCU read-side critical section" docbook comment was obsoleted long ago by preemptible RCU, so this patch brings it up to the present day. 10. Add comments above the RCU CPU stall-warning printk()s pointing people at the Documentation/RCU/stallwarn.txt documentation. For a testing-only version of this patchset from git, please see: git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-2.6-rcu.git rcu/testing Thanx, Paul Documentation/DocBook/kernel-locking.tmpl | 6 b/Documentation/DocBook/kernel-locking.tmpl | 8 b/include/linux/hardirq.h | 2 b/include/linux/init_task.h | 10 b/include/linux/rcupdate.h | 6 b/include/linux/rcutiny.h | 126 ++++-- b/include/linux/rcutree.h | 2 b/include/linux/sched.h | 10 b/init/Kconfig | 1 b/kernel/Makefile | 1 b/kernel/rcutiny.c | 33 - b/kernel/rcutiny_plugin.h | 580 +++++++++++++++++++++++++++- b/kernel/rcutree.c | 2 b/kernel/rcutree.h | 6 b/lib/Kconfig.debug | 13 include/linux/rcupdate.h | 18 init/Kconfig | 25 + kernel/rcutree.c | 14 18 files changed, 771 insertions(+), 92 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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