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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-01-07 09:04:22 +0300
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-01-23 22:37:14 +0300
commitbb4e2c08bbfa8eb032db7814f6100086aac102d3 (patch)
tree9f5f9cf8d14f4fb6e70dc72061d6c793032b3625 /Documentation/RCU
parentd78973c32a210b0057b51880f7119bf2b61d5a65 (diff)
downloadlinux-bb4e2c08bbfa8eb032db7814f6100086aac102d3.tar.xz
rcu: Eliminate unused expedited_normal counter
Expedited grace periods no longer fall back to normal grace periods in response to lock contention, given that expedited grace periods now use the rcu_node tree so as to avoid contention. This commit therfore removes the expedited_normal counter. Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
Diffstat (limited to 'Documentation/RCU')
-rw-r--r--Documentation/RCU/trace.txt5
1 files changed, 1 insertions, 4 deletions
diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt
index 00a3a38b375a..6549012033f9 100644
--- a/Documentation/RCU/trace.txt
+++ b/Documentation/RCU/trace.txt
@@ -237,7 +237,7 @@ o "ktl" is the low-order 16 bits (in hexadecimal) of the count of
The output of "cat rcu/rcu_preempt/rcuexp" looks as follows:
-s=21872 wd1=0 wd2=0 wd3=5 n=0 enq=0 sc=21872
+s=21872 wd1=0 wd2=0 wd3=5 enq=0 sc=21872
These fields are as follows:
@@ -249,9 +249,6 @@ o "wd1", "wd2", and "wd3" are the number of times that an attempt
completed an expedited grace period that satisfies the attempted
request. "Our work is done."
-o "n" is number of times that a concurrent CPU-hotplug operation
- forced a fallback to a normal grace period.
-
o "enq" is the number of quiescent states still outstanding.
o "sc" is the number of times that the attempt to start a