rcu: Document SRCU dead-CPU capabilities, emphasize read-side limits
authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Fri, 3 Aug 2012 23:41:23 +0000 (16:41 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Sun, 23 Sep 2012 14:42:23 +0000 (07:42 -0700)
commit2aef619c7524d73d18ff7b102a1706066b69141d
treeda1409acbdc4baca4858af9fbc7e413fd5efa0d0
parent13dbf9140c726c307a9c7e2b7ff83cf95da3bb44
rcu: Document SRCU dead-CPU capabilities, emphasize read-side limits

The current documentation did not help someone grepping for SRCU to
learn that disabling preemption is not a replacement for srcu_read_lock(),
so upgrade the documentation to bring this out, not just for SRCU,
but also for RCU-bh.  Also document the fact that SRCU readers are
respected on CPUs executing in user mode, idle CPUs, and even on
offline CPUs.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Reviewed-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Documentation/RCU/checklist.txt
Documentation/RCU/whatisRCU.txt