]> git.baikalelectronics.ru Git - kernel.git/commit
rcu: Separate accounting of callbacks from callback-free CPUs
authorPaul E. McKenney <paul.mckenney@linaro.org>
Mon, 29 Oct 2012 14:29:20 +0000 (07:29 -0700)
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>
Fri, 16 Nov 2012 18:05:57 +0000 (10:05 -0800)
commit7391eb92ced2ee492247e56c93736bb3d9e617b8
treeac1cced2e0c05d5edcd74af6d3493e15e99a7cec
parent57584586e7a414f0761d81cfc7709c8da0fad003
rcu: Separate accounting of callbacks from callback-free CPUs

Currently, callback invocations from callback-free CPUs are accounted to
the CPU that registered the callback, but using the same field that is
used for normal callbacks.  This makes it impossible to determine from
debugfs output whether callbacks are in fact being diverted.  This commit
therefore adds a separate ->n_nocbs_invoked field in the rcu_data structure
in which diverted callback invocations are counted.  RCU's debugfs tracing
still displays normal callback invocations using ci=, but displayed
diverted callbacks with nci=.

Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
kernel/rcutree.h
kernel/rcutree_plugin.h
kernel/rcutree_trace.c