rcu: merge TREE_PREEPT_RCU blocked_tasks[] lists
authorPaul E. McKenney <paul.mckenney@linaro.org>
Tue, 30 Nov 2010 05:56:39 +0000 (21:56 -0800)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Fri, 6 May 2011 06:16:54 +0000 (23:16 -0700)
commit12f5f524cafef3ab689929b118f2dfb8bf2be321
tree639473556b6edf9b79e0a18d5ba58f80eea76519
parente59fb3120becfb36b22ddb8bd27d065d3cdca499
rcu: merge TREE_PREEPT_RCU blocked_tasks[] lists

Combine the current TREE_PREEMPT_RCU ->blocked_tasks[] lists in the
rcu_node structure into a single ->blkd_tasks list with ->gp_tasks
and ->exp_tasks tail pointers.  This is in preparation for RCU priority
boosting, which will add a third dimension to the combinatorial explosion
in the ->blocked_tasks[] case, but simply a third pointer in the new
->blkd_tasks case.

Also update documentation to reflect blocked_tasks[] merge

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Documentation/RCU/trace.txt
kernel/rcutree.c
kernel/rcutree.h
kernel/rcutree_plugin.h
kernel/rcutree_trace.c