>From edbd0adf8aafef3704b9059ae484ee44f2aa308e Mon Sep 17 00:00:00 2001
From: Akira Yokosawa <akiyks@xxxxxxxxx>
Date: Mon, 22 May 2017 23:46:27 +0900
Subject: [PATCH 2/2] count: Remove unnecessary smp_mb() in code snippet
Reflect the fix made in commit 853027876a8c ("count_stat_eventual:
Remove unnecessary smp_mb()").
Signed-off-by: Akira Yokosawa <akiyks@xxxxxxxxx>
---
count/count.tex | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/count/count.tex b/count/count.tex
index ae624c6..1b5b030 100644
--- a/count/count.tex
+++ b/count/count.tex
@@ -793,11 +793,10 @@ eventually consistent.
45 void count_cleanup(void)
46 {
47 WRITE_ONCE(stopflag, 1);
-48 smp_mb();
-49 while (READ_ONCE(stopflag) < 3)
-50 poll(NULL, 0, 1);
-51 smp_mb();
-52 }
+48 while (READ_ONCE(stopflag) < 3)
+49 poll(NULL, 0, 1);
+50 smp_mb();
+51 }
\end{verbbox}
}
\centering
@@ -826,7 +825,7 @@ summing the per-thread local \co{counter} and storing the
sum to the \co{global_count} variable.
The \co{eventual()} thread waits an arbitrarily chosen one millisecond
between passes.
-The \co{count_cleanup()} function on lines~45-52 coordinates termination.
+The \co{count_cleanup()} function on lines~45-51 coordinates termination.
This approach gives extremely fast counter read-out while still
supporting linear counter-update performance.
--
2.7.4
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