This is a note to let you know that I've just added the patch titled
selftests/tracing: Fix event filter test to retry up to 10 times
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
selftests-tracing-fix-event-filter-test-to-retry-up-.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ded9eb3734e1b9cf8a5568adf25bb2f1ada6d20e
Author: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Date: Fri May 31 18:43:37 2024 +0900
selftests/tracing: Fix event filter test to retry up to 10 times
[ Upstream commit 0f42bdf59b4e428485aa922bef871bfa6cc505e0 ]
Commit eb50d0f250e9 ("selftests/ftrace: Choose target function for filter
test from samples") choose the target function from samples, but sometimes
this test failes randomly because the target function does not hit at the
next time. So retry getting samples up to 10 times.
Fixes: eb50d0f250e9 ("selftests/ftrace: Choose target function for filter test from samples")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc b/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc
index 3f74c09c56b62..118247b8dd84d 100644
--- a/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc
+++ b/tools/testing/selftests/ftrace/test.d/filter/event-filter-function.tc
@@ -10,7 +10,6 @@ fail() { #msg
}
sample_events() {
- echo > trace
echo 1 > events/kmem/kmem_cache_free/enable
echo 1 > tracing_on
ls > /dev/null
@@ -22,6 +21,7 @@ echo 0 > tracing_on
echo 0 > events/enable
echo "Get the most frequently calling function"
+echo > trace
sample_events
target_func=`cat trace | grep -o 'call_site=\([^+]*\)' | sed 's/call_site=//' | sort | uniq -c | sort | tail -n 1 | sed 's/^[ 0-9]*//'`
@@ -32,7 +32,16 @@ echo > trace
echo "Test event filter function name"
echo "call_site.function == $target_func" > events/kmem/kmem_cache_free/filter
+
+sample_events
+max_retry=10
+while [ `grep kmem_cache_free trace| wc -l` -eq 0 ]; do
sample_events
+max_retry=$((max_retry - 1))
+if [ $max_retry -eq 0 ]; then
+ exit_fail
+fi
+done
hitcnt=`grep kmem_cache_free trace| grep $target_func | wc -l`
misscnt=`grep kmem_cache_free trace| grep -v $target_func | wc -l`
@@ -49,7 +58,16 @@ address=`grep " ${target_func}\$" /proc/kallsyms | cut -d' ' -f1`
echo "Test event filter function address"
echo "call_site.function == 0x$address" > events/kmem/kmem_cache_free/filter
+echo > trace
+sample_events
+max_retry=10
+while [ `grep kmem_cache_free trace| wc -l` -eq 0 ]; do
sample_events
+max_retry=$((max_retry - 1))
+if [ $max_retry -eq 0 ]; then
+ exit_fail
+fi
+done
hitcnt=`grep kmem_cache_free trace| grep $target_func | wc -l`
misscnt=`grep kmem_cache_free trace| grep -v $target_func | wc -l`
