linux-kernel - Re: [GIT PULL rcu/urgent] Fixes for 3.16

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Date:	Wed, 25 Jun 2014 07:39:20 +0200
From:	Ingo Molnar <mingo@...nel.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, sasha.levin@...cle.com,
	tglx@...utronix.de, cl@...ux.com, dave.hansen@...el.com,
	ak@...ux.intel.com, umgwanakikbuti@...il.com,
	eric.dumazet@...il.com, josh@...htriplett.org, oleg@...hat.com
Subject: Re: [GIT PULL rcu/urgent] Fixes for 3.16


* Paul E. McKenney <paulmck@...ux.vnet.ibm.com> wrote:

> Hello, Ingo,
> 
> This series includes the following:
> 
> 1.	Export a pair of debug-object interfaces for RCU that will
> 	allow the slab allocators to avoid a recursion bug located
> 	by Sasha Levin.  Strictly speaking, this is not a regression,
> 	but it would be good to enable the fix.
> 
> 2.	Address a serious performance regression on an open/close
> 	micro-benchmark located by Dave Hansen.  The offending commit
> 	is ac1bea85781e (Make cond_resched() report RCU quiescent states).
> 
> Both have been exposed to -next testing, and are available in the git
> repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git urgent.2014.06.23a
> 
> for you to fetch changes up to 4a81e8328d3791a4f99bf5b436d050f6dc5ffea3:
> 
>   rcu: Reduce overhead of cond_resched() checks for RCU (2014-06-23 11:19:32 -0700)
> 
> ----------------------------------------------------------------
> Paul E. McKenney (2):
>       rcu: Export debug_init_rcu_head() and and debug_init_rcu_head()
>       rcu: Reduce overhead of cond_resched() checks for RCU
> 
>  Documentation/kernel-parameters.txt |   6 ++
>  include/linux/rcupdate.h            |  46 +++---------
>  kernel/rcu/tree.c                   | 140 ++++++++++++++++++++++++++++--------
>  kernel/rcu/tree.h                   |   6 +-
>  kernel/rcu/tree_plugin.h            |   2 +-
>  kernel/rcu/update.c                 |  22 +-----
>  kernel/sched/core.c                 |   7 +-
>  7 files changed, 137 insertions(+), 92 deletions(-)
> 

Pulled into tip:core/urgent, thanks a lot Paul!

	Ingo
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